[SPARKR][MINOR] Remove reference link for common Windows environment variables
[SPARKR][MINOR] Remove reference link for common Windows environment variables

## What changes were proposed in this pull request?

The PR removes reference link in the doc for environment variables for common Windows folders. The cran check gave code 503: service unavailable on the original link.

## How was this patch tested?

Manual check.

Author: Junyang Qian <junyangq@databricks.com>

Closes #14767 from junyangq/SPARKR-RemoveLink.

bdrillard/spark,liyichao/spark,wzhfy/spark,nlalevee/spark,Panos-Bletsos/spark-cost-model-optimizer,UndeadBaneGitHub/spark,rekhajoshm/spark,stanzhai/spark,apache-spark-on-k8s/spark,LantaoJin/spark,debugger87/spark,mike0sv/spark,zzcclp/spark,ahnqirage/spark,liutang123/spark,esi-mineset/spark,SHASHANKB/spark,MLnick/spark,JoshRosen/spark,ibm-research-ireland/sparkoscope,wzhfy/spark,xuanyuanking/spark,ueshin/apache-spark,zero323/spark,kissmetrics/spark,nlalevee/spark,taroplus/spark,dhruve/spark,sachintyagi22/spark,wangyum/spark,sureshthalamati/spark,taroplus/spark,guoxiaolongzte/spark,map222/spark,janewangfb/spark,dhruve/spark,zuotingbing/spark,vinodkc/spark,WeichenXu123/spark,BryanCutler/spark,holdenk/spark,mahak/spark,WindCanDie/spark,pgandhi999/spark,ptkool/spark,chuckchen/spark,mahak/spark,dongjoon-hyun/spark,wzhfy/spark,mzl9039/spark,kiszk/spark,panfengfeng/spark,jianran/spark,apache/spark,Aegeaner/spark,huang1900/spark,lvdongr/spark,skonto/spark,techaddict/spark,darionyaphet/spark,bravo-zhang/spark,brad-kaiser/spark,dongjoon-hyun/spark,wangmiao1981/spark,michalsenkyr/spark,SnappyDataInc/spark,JoshRosen/spark,wzhfy/spark,icexelloss/spark,maropu/spark,rikima/spark,jrshust/spark,maropu/spark,someorz/spark,ConeyLiu/spark,1haodian/spark,zzcclp/spark,alunarbeach/spark,shaneknapp/spark,markhamstra/spark,ueshin/apache-spark,JerryLead/spark,guoxiaolongzte/spark,mdespriee/spark,kiszk/spark,big-pegasus/spark,rezasafi/spark,taroplus/spark,taroplus/spark,UndeadBaneGitHub/spark,hhbyyh/spark,caneGuy/spark,LantaoJin/spark,caneGuy/spark,nchammas/spark,ioana-delaney/spark,shuangshuangwang/spark,stanzhai/spark,ddna1021/spark,HyukjinKwon/spark,rednaxelafx/apache-spark,patrick-nicholson/spark,patrick-nicholson/spark,jianran/spark,UndeadBaneGitHub/spark,zhouyejoe/spark,ron8hu/spark,akopich/spark,cin/spark,huang1900/spark,ajaysaini725/spark,kevinyu98/spark,tejasapatil/spark,spark-test/spark,wangyum/spark,apache-spark-on-k8s/spark,hvanhovell/spark,szhem/spark,kevinyu98/spark,guoxiaolongzte/spark,HyukjinKwon/spark,adrian-ionescu/apache-spark,aokolnychyi/spark,liutang123/spark,aray/spark,ConeyLiu/spark,maropu/spark,poffuomo/spark,lxsmnv/spark,minixalpha/spark,wangmiao1981/spark,publicRoman/spark,brad-kaiser/spark,adrian-ionescu/apache-spark,ddna1021/spark,map222/spark,apache/spark,zero323/spark,shaneknapp/spark,minixalpha/spark,cin/spark,ahnqirage/spark,bdrillard/spark,guoxiaolongzte/spark,kimoonkim/spark,shubhamchopra/spark,taroplus/spark,holdenk/spark,srowen/spark,tejasapatil/spark,janewangfb/spark,guoxiaolongzte/spark,jlopezmalla/spark,markhamstra/spark,apache-spark-on-k8s/spark,bdrillard/spark,rikima/spark,milliman/spark,markhamstra/spark,nchammas/spark,ahnqirage/spark,big-pegasus/spark,cin/spark,JerryLead/spark,bdrillard/spark,apache/spark,facaiy/spark,darionyaphet/spark,maropu/spark,actuaryzhang/spark,ibm-research-ireland/sparkoscope,mzl9039/spark,panfengfeng/spark,lxsmnv/spark,srowen/spark,hvanhovell/spark,jiangxb1987/spark,joseph-torres/spark,skonto/spark,rezasafi/spark,WeichenXu123/spark,kevinyu98/spark,patrick-nicholson/spark,BryanCutler/spark,alunarbeach/spark,shuangshuangwang/spark,metamx/spark,ddna1021/spark,techaddict/spark,publicRoman/spark,caneGuy/spark,actuaryzhang/spark,wangyum/spark,rednaxelafx/apache-spark,saturday-shi/spark,darionyaphet/spark,zuotingbing/spark,shuangshuangwang/spark,wzhfy/spark,rednaxelafx/apache-spark,cin/spark,matthewfranglen/spark,goldmedal/spark,ajaysaini725/spark,someorz/spark,UndeadBaneGitHub/spark,aosagie/spark,hhbyyh/spark,xuanyuanking/spark,metamx/spark,mahak/spark,narahari92/spark,gengliangwang/spark,andrewor14/spark,setjet/spark,lvdongr/spark,loneknightpy/spark,akopich/spark,chuckchen/spark,nchammas/spark,maropu/spark,hvanhovell/spark,mzl9039/spark,tejasapatil/spark,narahari92/spark,dhruve/spark,aosagie/spark,pgandhi999/spark,caneGuy/spark,HyukjinKwon/spark,actuaryzhang/spark,sahilTakiar/spark,xuanyuanking/spark,shubhamchopra/spark,saltstar/spark,metamx/spark,loneknightpy/spark,1haodian/spark,akopich/spark,map222/spark,yanboliang/spark,wangyum/spark,caneGuy/spark,srowen/spark,janewangfb/spark,wangyum/spark,jianran/spark,minixalpha/spark,zhouyejoe/spark,byakuinss/spark,setjet/spark,nilsgrabbert/spark,huang1900/spark,1haodian/spark,caneGuy/spark,jrshust/spark,narahari92/spark,mdespriee/spark,Aegeaner/spark,jlopezmalla/spark,markhamstra/spark,debugger87/spark,narahari92/spark,SnappyDataInc/spark,WindCanDie/spark,apache-spark-on-k8s/spark,dongjoon-hyun/spark,alunarbeach/spark,bravo-zhang/spark,alunarbeach/spark,maropu/spark,JoshRosen/spark,narahari92/spark,1haodian/spark,poffuomo/spark,saltstar/spark,spark-test/spark,spark-test/spark,jlopezmalla/spark,goldmedal/spark,ericvandenbergfb/spark,setjet/spark,vinodkc/spark,byakuinss/spark,someorz/spark,vinodkc/spark,cloud-fan/spark,wangmiao1981/spark,hhbyyh/spark,nlalevee/spark,cloud-fan/spark,dbtsai/spark,eyalfa/spark,rekhajoshm/spark,liutang123/spark,ueshin/apache-spark,byakuinss/spark,bravo-zhang/spark,byakuinss/spark,alunarbeach/spark,liyichao/spark,minixalpha/spark,jiangxb1987/spark,rezasafi/spark,hhbyyh/spark,ddna1021/spark,facaiy/spark,WindCanDie/spark,mike0sv/spark,tengpeng/spark,guoxiaolongzte/spark,mzl9039/spark,rednaxelafx/apache-spark,ptkool/spark,cloud-fan/spark,zero323/spark,vinodkc/spark,dbtsai/spark,zzcclp/spark,ahnqirage/spark,xflin/spark,holdenk/spark,chuckchen/spark,rikima/spark,ron8hu/spark,joseph-torres/spark,zuotingbing/spark,pgandhi999/spark,ibm-research-ireland/sparkoscope,bOOm-X/spark,akopich/spark,shuangshuangwang/spark,lxsmnv/spark,techaddict/spark,vinodkc/spark,shaneknapp/spark,witgo/spark,WindCanDie/spark,aokolnychyi/spark,huang1900/spark,kevinyu98/spark,lvdongr/spark,kimoonkim/spark,Aegeaner/spark,someorz/spark,gengliangwang/spark,SnappyDataInc/spark,big-pegasus/spark,rezasafi/spark,yanboliang/spark,dongjoon-hyun/spark,hvanhovell/spark,publicRoman/spark,liutang123/spark,bOOm-X/spark,chuckchen/spark,setjet/spark,joseph-torres/spark,facaiy/spark,zzcclp/spark,bdrillard/spark,setjet/spark,MLnick/spark,ibm-research-ireland/sparkoscope,nilsgrabbert/spark,setjet/spark,darionyaphet/spark,aosagie/spark,rezasafi/spark,lvdongr/spark,apache/spark,minixalpha/spark,zuotingbing/spark,janewangfb/spark,ericvandenbergfb/spark,goldmedal/spark,pgandhi999/spark,ConeyLiu/spark,srowen/spark,WeichenXu123/spark,ioana-delaney/spark,eyalfa/spark,shuangshuangwang/spark,apache/spark,kevinyu98/spark,esi-mineset/spark,sahilTakiar/spark,ibm-research-ireland/sparkoscope,BryanCutler/spark,ioana-delaney/spark,LantaoJin/spark,aosagie/spark,dbtsai/spark,pgandhi999/spark,loneknightpy/spark,Panos-Bletsos/spark-cost-model-optimizer,BryanCutler/spark,mdespriee/spark,ueshin/apache-spark,chuckchen/spark,milliman/spark,aray/spark,witgo/spark,techaddict/spark,akopich/spark,pgandhi999/spark,rezasafi/spark,shubhamchopra/spark,zuotingbing/spark,witgo/spark,witgo/spark,dbtsai/spark,shaneknapp/spark,sachintyagi22/spark,spark-test/spark,HyukjinKwon/spark,ptkool/spark,andrewor14/spark,jianran/spark,sachintyagi22/spark,byakuinss/spark,akopich/spark,icexelloss/spark,xflin/spark,ioana-delaney/spark,SHASHANKB/spark,rekhajoshm/spark,tengpeng/spark,xflin/spark,dongjoon-hyun/spark,zzcclp/spark,techaddict/spark,brad-kaiser/spark,panfengfeng/spark,eyalfa/spark,mdespriee/spark,panfengfeng/spark,panfengfeng/spark,WeichenXu123/spark,jianran/spark,srowen/spark,setjet/spark,szhem/spark,map222/spark,rikima/spark,holdenk/spark,ConeyLiu/spark,taroplus/spark,mahak/spark,JerryLead/spark,zuotingbing/spark,sureshthalamati/spark,UndeadBaneGitHub/spark,aray/spark,sahilTakiar/spark,debugger87/spark,huang1900/spark,SHASHANKB/spark,lxsmnv/spark,publicRoman/spark,chuckchen/spark,kissmetrics/spark,ddna1021/spark,ioana-delaney/spark,xuanyuanking/spark,saturday-shi/spark,UndeadBaneGitHub/spark,jkbradley/spark,WindCanDie/spark,SnappyDataInc/spark,metamx/spark,Panos-Bletsos/spark-cost-model-optimizer,JoshRosen/spark,aosagie/spark,zzcclp/spark,loneknightpy/spark,debugger87/spark,goldmedal/spark,narahari92/spark,ajaysaini725/spark,kissmetrics/spark,apache-spark-on-k8s/spark,rekhajoshm/spark,huang1900/spark,ptkool/spark,metamx/spark,dhruve/spark,mdespriee/spark,mike0sv/spark,witgo/spark,tejasapatil/spark,witgo/spark,bOOm-X/spark,WeichenXu123/spark,1haodian/spark,liutang123/spark,tejasapatil/spark,SnappyDataInc/spark,shuangshuangwang/spark,SHASHANKB/spark,ahnqirage/spark,aokolnychyi/spark,taroplus/spark,ajaysaini725/spark,milliman/spark,byakuinss/spark,esi-mineset/spark,alunarbeach/spark,wangyum/spark,kiszk/spark,zero323/spark,michalsenkyr/spark,nilsgrabbert/spark,ajaysaini725/spark,Aegeaner/spark,bravo-zhang/spark,bdrillard/spark,chuckchen/spark,jrshust/spark,janewangfb/spark,loneknightpy/spark,sachintyagi22/spark,skonto/spark,bOOm-X/spark,patrick-nicholson/spark,byakuinss/spark,dongjoon-hyun/spark,kevinyu98/spark,skonto/spark,gengliangwang/spark,sahilTakiar/spark,michalsenkyr/spark,goldmedal/spark,nchammas/spark,kiszk/spark,highfei2011/spark,big-pegasus/spark,jkbradley/spark,ericvandenbergfb/spark,markhamstra/spark,JerryLead/spark,shaneknapp/spark,liyichao/spark,darionyaphet/spark,jiangxb1987/spark,aray/spark,patrick-nicholson/spark,WindCanDie/spark,highfei2011/spark,wangmiao1981/spark,ddna1021/spark,michalsenkyr/spark,holdenk/spark,MLnick/spark,liyichao/spark,kevinyu98/spark,bravo-zhang/spark,publicRoman/spark,saturday-shi/spark,mahak/spark,jrshust/spark,rezasafi/spark,janewangfb/spark,HyukjinKwon/spark,cloud-fan/spark,darionyaphet/spark,map222/spark,ConeyLiu/spark,mike0sv/spark,actuaryzhang/spark,SHASHANKB/spark,hhbyyh/spark,poffuomo/spark,mahak/spark,hvanhovell/spark,minixalpha/spark,joseph-torres/spark,cloud-fan/spark,techaddict/spark,Aegeaner/spark,rikima/spark,poffuomo/spark,sahilTakiar/spark,jrshust/spark,maropu/spark,tengpeng/spark,yanboliang/spark,saturday-shi/spark,ptkool/spark,sureshthalamati/spark,kimoonkim/spark,stanzhai/spark,jlopezmalla/spark,yanboliang/spark,spark-test/spark,jkbradley/spark,publicRoman/spark,Panos-Bletsos/spark-cost-model-optimizer,aokolnychyi/spark,patrick-nicholson/spark,skonto/spark,debugger87/spark,SHASHANKB/spark,facaiy/spark,vinodkc/spark,tengpeng/spark,nilsgrabbert/spark,sureshthalamati/spark,shubhamchopra/spark,SnappyDataInc/spark,ron8hu/spark,rekhajoshm/spark,jkbradley/spark,mike0sv/spark,aosagie/spark,rekhajoshm/spark,stanzhai/spark,jlopezmalla/spark,dhruve/spark,saturday-shi/spark,nilsgrabbert/spark,andrewor14/spark,vinodkc/spark,mzl9039/spark,bOOm-X/spark,ericvandenbergfb/spark,lxsmnv/spark,akopich/spark,techaddict/spark,ericvandenbergfb/spark,ericvandenbergfb/spark,goldmedal/spark,LantaoJin/spark,skonto/spark,map222/spark,zzcclp/spark,pgandhi999/spark,stanzhai/spark,mdespriee/spark,michalsenkyr/spark,cin/spark,ericvandenbergfb/spark,esi-mineset/spark,hhbyyh/spark,zero323/spark,BryanCutler/spark,UndeadBaneGitHub/spark,debugger87/spark,yanboliang/spark,ptkool/spark,LantaoJin/spark,WeichenXu123/spark,bOOm-X/spark,xflin/spark,wangmiao1981/spark,xflin/spark,ioana-delaney/spark,gengliangwang/spark,nilsgrabbert/spark,darionyaphet/spark,panfengfeng/spark,eyalfa/spark,adrian-ionescu/apache-spark,JoshRosen/spark,jkbradley/spark,kimoonkim/spark,highfei2011/spark,stanzhai/spark,kimoonkim/spark,icexelloss/spark,liutang123/spark,ibm-research-ireland/sparkoscope,tengpeng/spark,sahilTakiar/spark,hvanhovell/spark,sahilTakiar/spark,aosagie/spark,shubhamchopra/spark,saltstar/spark,nilsgrabbert/spark,adrian-ionescu/apache-spark,spark-test/spark,tejasapatil/spark,ueshin/apache-spark,bravo-zhang/spark,jlopezmalla/spark,SnappyDataInc/spark,aray/spark,ioana-delaney/spark,kissmetrics/spark,dbtsai/spark,witgo/spark,dbtsai/spark,Aegeaner/spark,xuanyuanking/spark,ron8hu/spark,wzhfy/spark,jiangxb1987/spark,eyalfa/spark,lvdongr/spark,saturday-shi/spark,srowen/spark,big-pegasus/spark,poffuomo/spark,andrewor14/spark,xflin/spark,poffuomo/spark,mdespriee/spark,WeichenXu123/spark,cloud-fan/spark,markhamstra/spark,Panos-Bletsos/spark-cost-model-optimizer,tengpeng/spark,caneGuy/spark,big-pegasus/spark,kissmetrics/spark,JerryLead/spark,yanboliang/spark,esi-mineset/spark,ConeyLiu/spark,aray/spark,joseph-torres/spark,Aegeaner/spark,lvdongr/spark,icexelloss/spark,panfengfeng/spark,mzl9039/spark,rekhajoshm/spark,zero323/spark,someorz/spark,kiszk/spark,Panos-Bletsos/spark-cost-model-optimizer,saltstar/spark,esi-mineset/spark,adrian-ionescu/apache-spark,tejasapatil/spark,gengliangwang/spark,highfei2011/spark,wzhfy/spark,jiangxb1987/spark,sachintyagi22/spark,goldmedal/spark,ahnqirage/spark,markhamstra/spark,bravo-zhang/spark,apache/spark,rikima/spark,saturday-shi/spark,jiangxb1987/spark,szhem/spark,ptkool/spark,ajaysaini725/spark,janewangfb/spark,sureshthalamati/spark,szhem/spark,sureshthalamati/spark,wangyum/spark,adrian-ionescu/apache-spark,debugger87/spark,jianran/spark,JerryLead/spark,highfei2011/spark,jianran/spark,jrshust/spark,dhruve/spark,Panos-Bletsos/spark-cost-model-optimizer,dhruve/spark,rikima/spark,ron8hu/spark,icexelloss/spark,liyichao/spark,brad-kaiser/spark,nlalevee/spark,milliman/spark,milliman/spark,saltstar/spark,rednaxelafx/apache-spark,kimoonkim/spark,1haodian/spark,szhem/spark,rednaxelafx/apache-spark,ddna1021/spark,aray/spark,zhouyejoe/spark,apache-spark-on-k8s/spark,adrian-ionescu/apache-spark,rednaxelafx/apache-spark,cin/spark,stanzhai/spark,xflin/spark,dbtsai/spark,tengpeng/spark,shubhamchopra/spark,lxsmnv/spark,ajaysaini725/spark,MLnick/spark,wangmiao1981/spark,nlalevee/spark,andrewor14/spark,nchammas/spark,apache-spark-on-k8s/spark,szhem/spark,yanboliang/spark,sachintyagi22/spark,jkbradley/spark,zhouyejoe/spark,joseph-torres/spark,sureshthalamati/spark,apache/spark,ibm-research-ireland/sparkoscope,aokolnychyi/spark,zhouyejoe/spark,kissmetrics/spark,ConeyLiu/spark,bOOm-X/spark,loneknightpy/spark,lxsmnv/spark,narahari92/spark,michalsenkyr/spark,minixalpha/spark,eyalfa/spark,facaiy/spark,cin/spark,mike0sv/spark,liutang123/spark,bdrillard/spark,ron8hu/spark,aokolnychyi/spark,1haodian/spark,brad-kaiser/spark,highfei2011/spark,BryanCutler/spark,jrshust/spark,saltstar/spark,brad-kaiser/spark,skonto/spark,aokolnychyi/spark,michalsenkyr/spark,saltstar/spark,andrewor14/spark,brad-kaiser/spark,szhem/spark,loneknightpy/spark,hvanhovell/spark,holdenk/spark,nlalevee/spark,shuangshuangwang/spark,ahnqirage/spark,mike0sv/spark,facaiy/spark,dongjoon-hyun/spark,guoxiaolongzte/spark,alunarbeach/spark,big-pegasus/spark,zhouyejoe/spark,actuaryzhang/spark,sachintyagi22/spark,kissmetrics/spark,facaiy/spark,shaneknapp/spark,gengliangwang/spark,icexelloss/spark,joseph-torres/spark,huang1900/spark,JerryLead/spark,metamx/spark,eyalfa/spark,xuanyuanking/spark,MLnick/spark,jiangxb1987/spark,shubhamchopra/spark,shaneknapp/spark,poffuomo/spark,zuotingbing/spark,MLnick/spark,JoshRosen/spark,milliman/spark,JoshRosen/spark,LantaoJin/spark,someorz/spark,patrick-nicholson/spark,xuanyuanking/spark,zhouyejoe/spark,mahak/spark,lvdongr/spark,zero323/spark,HyukjinKwon/spark,nchammas/spark,highfei2011/spark,kiszk/spark,spark-test/spark,kiszk/spark,jkbradley/spark,ueshin/apache-spark,andrewor14/spark,publicRoman/spark,ueshin/apache-spark,wangmiao1981/spark,LantaoJin/spark,map222/spark,icexelloss/spark,metamx/spark,actuaryzhang/spark,BryanCutler/spark,esi-mineset/spark,ron8hu/spark,actuaryzhang/spark,MLnick/spark,WindCanDie/spark,jlopezmalla/spark,liyichao/spark,liyichao/spark,SHASHANKB/spark,someorz/spark,hhbyyh/spark,srowen/spark,gengliangwang/spark,cloud-fan/spark,holdenk/spark,kimoonkim/spark,mzl9039/spark,HyukjinKwon/spark,milliman/spark,nchammas/spark,nlalevee/spark