[MINOR][DOC] Remove obsolete `ec2-scripts.md`
[MINOR][DOC] Remove obsolete `ec2-scripts.md`

## What changes were proposed in this pull request?

Since this document became obsolete, we had better remove this for Apache Spark 2.3.0. The original document is removed via SPARK-12735 on January 2016, and currently it's just redirection page. The only reference in Apache Spark website will go directly to the destination in https://github.com/apache/spark-website/pull/54.

## How was this patch tested?

N/A. This is a removal of documentation.

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #18578 from dongjoon-hyun/SPARK-REMOVE-EC2.

chuckchen/spark,nlalevee/spark,gengliangwang/spark,wangmiao1981/spark,LantaoJin/spark,akopich/spark,joseph-torres/spark,joseph-torres/spark,milliman/spark,sahilTakiar/spark,goldmedal/spark,srowen/spark,zhouyejoe/spark,guoxiaolongzte/spark,ptkool/spark,spark-test/spark,kevinyu98/spark,aosagie/spark,zhouyejoe/spark,byakuinss/spark,joseph-torres/spark,xflin/spark,darionyaphet/spark,darionyaphet/spark,akopich/spark,someorz/spark,zzcclp/spark,actuaryzhang/spark,mahak/spark,ericvandenbergfb/spark,zero323/spark,techaddict/spark,eyalfa/spark,WindCanDie/spark,kiszk/spark,zzcclp/spark,rikima/spark,wangyum/spark,gengliangwang/spark,ddna1021/spark,xuanyuanking/spark,maropu/spark,UndeadBaneGitHub/spark,gengliangwang/spark,maropu/spark,ahnqirage/spark,rezasafi/spark,JoshRosen/spark,xuanyuanking/spark,goldmedal/spark,kiszk/spark,actuaryzhang/spark,LantaoJin/spark,chuckchen/spark,guoxiaolongzte/spark,janewangfb/spark,jiangxb1987/spark,eyalfa/spark,jkbradley/spark,adrian-ionescu/apache-spark,gengliangwang/spark,taroplus/spark,shubhamchopra/spark,mahak/spark,kiszk/spark,debugger87/spark,actuaryzhang/spark,Aegeaner/spark,WeichenXu123/spark,ptkool/spark,alunarbeach/spark,bdrillard/spark,holdenk/spark,wangmiao1981/spark,lxsmnv/spark,zuotingbing/spark,milliman/spark,xflin/spark,saltstar/spark,1haodian/spark,joseph-torres/spark,sureshthalamati/spark,jkbradley/spark,ddna1021/spark,WeichenXu123/spark,alunarbeach/spark,aosagie/spark,Aegeaner/spark,dbtsai/spark,sahilTakiar/spark,sahilTakiar/spark,ConeyLiu/spark,caneGuy/spark,UndeadBaneGitHub/spark,jiangxb1987/spark,highfei2011/spark,rednaxelafx/apache-spark,mike0sv/spark,kevinyu98/spark,wangyum/spark,JoshRosen/spark,nilsgrabbert/spark,ajaysaini725/spark,dbtsai/spark,HyukjinKwon/spark,mdespriee/spark,icexelloss/spark,SHASHANKB/spark,goldmedal/spark,Aegeaner/spark,shaneknapp/spark,aosagie/spark,michalsenkyr/spark,xflin/spark,witgo/spark,apache/spark,markhamstra/spark,facaiy/spark,rezasafi/spark,ConeyLiu/spark,SHASHANKB/spark,taroplus/spark,kiszk/spark,byakuinss/spark,highfei2011/spark,lxsmnv/spark,stanzhai/spark,maropu/spark,janewangfb/spark,zero323/spark,1haodian/spark,bravo-zhang/spark,mike0sv/spark,lvdongr/spark,tejasapatil/spark,HyukjinKwon/spark,minixalpha/spark,skonto/spark,LantaoJin/spark,apache/spark,dongjoon-hyun/spark,bravo-zhang/spark,ron8hu/spark,1haodian/spark,rikima/spark,dongjoon-hyun/spark,zhouyejoe/spark,WindCanDie/spark,ddna1021/spark,shubhamchopra/spark,nchammas/spark,dbtsai/spark,actuaryzhang/spark,apache/spark,debugger87/spark,UndeadBaneGitHub/spark,vinodkc/spark,zzcclp/spark,cloud-fan/spark,hhbyyh/spark,nchammas/spark,icexelloss/spark,minixalpha/spark,ahnqirage/spark,wangmiao1981/spark,someorz/spark,bdrillard/spark,yanboliang/spark,jiangxb1987/spark,someorz/spark,actuaryzhang/spark,taroplus/spark,someorz/spark,UndeadBaneGitHub/spark,techaddict/spark,icexelloss/spark,debugger87/spark,mdespriee/spark,cin/spark,sureshthalamati/spark,xuanyuanking/spark,wzhfy/spark,xuanyuanking/spark,shuangshuangwang/spark,UndeadBaneGitHub/spark,saltstar/spark,esi-mineset/spark,dongjoon-hyun/spark,narahari92/spark,WeichenXu123/spark,cin/spark,nchammas/spark,holdenk/spark,pgandhi999/spark,shaneknapp/spark,pgandhi999/spark,Aegeaner/spark,someorz/spark,spark-test/spark,szhem/spark,skonto/spark,zero323/spark,nilsgrabbert/spark,byakuinss/spark,zhouyejoe/spark,rednaxelafx/apache-spark,stanzhai/spark,ericvandenbergfb/spark,guoxiaolongzte/spark,zhouyejoe/spark,szhem/spark,mdespriee/spark,rikima/spark,sahilTakiar/spark,szhem/spark,SHASHANKB/spark,cloud-fan/spark,alunarbeach/spark,sureshthalamati/spark,ron8hu/spark,caneGuy/spark,tejasapatil/spark,eyalfa/spark,wangyum/spark,mahak/spark,highfei2011/spark,debugger87/spark,tejasapatil/spark,darionyaphet/spark,tejasapatil/spark,HyukjinKwon/spark,chuckchen/spark,actuaryzhang/spark,akopich/spark,zuotingbing/spark,pgandhi999/spark,adrian-ionescu/apache-spark,nchammas/spark,yanboliang/spark,michalsenkyr/spark,saltstar/spark,facaiy/spark,byakuinss/spark,ueshin/apache-spark,minixalpha/spark,nilsgrabbert/spark,rekhajoshm/spark,ericvandenbergfb/spark,hvanhovell/spark,markhamstra/spark,someorz/spark,stanzhai/spark,nlalevee/spark,kevinyu98/spark,witgo/spark,bravo-zhang/spark,mike0sv/spark,akopich/spark,hhbyyh/spark,alunarbeach/spark,rednaxelafx/apache-spark,witgo/spark,BryanCutler/spark,gengliangwang/spark,gengliangwang/spark,bravo-zhang/spark,WindCanDie/spark,guoxiaolongzte/spark,tengpeng/spark,minixalpha/spark,witgo/spark,lxsmnv/spark,zuotingbing/spark,shaneknapp/spark,esi-mineset/spark,shuangshuangwang/spark,saltstar/spark,WindCanDie/spark,nlalevee/spark,dongjoon-hyun/spark,eyalfa/spark,joseph-torres/spark,ajaysaini725/spark,jiangxb1987/spark,jkbradley/spark,esi-mineset/spark,tejasapatil/spark,aray/spark,brad-kaiser/spark,ueshin/apache-spark,darionyaphet/spark,stanzhai/spark,joseph-torres/spark,ConeyLiu/spark,rekhajoshm/spark,ueshin/apache-spark,hvanhovell/spark,ioana-delaney/spark,cloud-fan/spark,UndeadBaneGitHub/spark,mike0sv/spark,skonto/spark,ioana-delaney/spark,mdespriee/spark,esi-mineset/spark,minixalpha/spark,WindCanDie/spark,zero323/spark,eyalfa/spark,wangyum/spark,yanboliang/spark,ddna1021/spark,tengpeng/spark,techaddict/spark,minixalpha/spark,michalsenkyr/spark,vinodkc/spark,zhouyejoe/spark,maropu/spark,zero323/spark,saltstar/spark,szhem/spark,BryanCutler/spark,BryanCutler/spark,sahilTakiar/spark,hhbyyh/spark,zuotingbing/spark,kevinyu98/spark,wangmiao1981/spark,tengpeng/spark,milliman/spark,taroplus/spark,sureshthalamati/spark,ptkool/spark,holdenk/spark,wzhfy/spark,jkbradley/spark,aray/spark,jkbradley/spark,rikima/spark,aray/spark,WeichenXu123/spark,rekhajoshm/spark,goldmedal/spark,highfei2011/spark,rezasafi/spark,ron8hu/spark,shuangshuangwang/spark,kevinyu98/spark,saltstar/spark,mahak/spark,BryanCutler/spark,sureshthalamati/spark,ahnqirage/spark,dbtsai/spark,wangyum/spark,rezasafi/spark,techaddict/spark,xuanyuanking/spark,ConeyLiu/spark,aosagie/spark,ajaysaini725/spark,shubhamchopra/spark,skonto/spark,apache/spark,milliman/spark,hvanhovell/spark,highfei2011/spark,HyukjinKwon/spark,SHASHANKB/spark,zhouyejoe/spark,facaiy/spark,markhamstra/spark,adrian-ionescu/apache-spark,UndeadBaneGitHub/spark,xflin/spark,lvdongr/spark,ron8hu/spark,wangmiao1981/spark,mike0sv/spark,shuangshuangwang/spark,holdenk/spark,1haodian/spark,wzhfy/spark,icexelloss/spark,rikima/spark,eyalfa/spark,narahari92/spark,zzcclp/spark,ajaysaini725/spark,zuotingbing/spark,aray/spark,WindCanDie/spark,cin/spark,srowen/spark,nlalevee/spark,facaiy/spark,narahari92/spark,Aegeaner/spark,WeichenXu123/spark,jkbradley/spark,ajaysaini725/spark,tengpeng/spark,shaneknapp/spark,ioana-delaney/spark,dbtsai/spark,narahari92/spark,mahak/spark,darionyaphet/spark,aosagie/spark,brad-kaiser/spark,kevinyu98/spark,srowen/spark,xuanyuanking/spark,rekhajoshm/spark,bdrillard/spark,szhem/spark,tengpeng/spark,narahari92/spark,pgandhi999/spark,brad-kaiser/spark,lxsmnv/spark,srowen/spark,bdrillard/spark,cin/spark,ConeyLiu/spark,adrian-ionescu/apache-spark,icexelloss/spark,zero323/spark,dongjoon-hyun/spark,darionyaphet/spark,milliman/spark,dbtsai/spark,sureshthalamati/spark,goldmedal/spark,cloud-fan/spark,JoshRosen/spark,ioana-delaney/spark,ptkool/spark,HyukjinKwon/spark,byakuinss/spark,shubhamchopra/spark,wangmiao1981/spark,caneGuy/spark,ueshin/apache-spark,rezasafi/spark,skonto/spark,ron8hu/spark,icexelloss/spark,yanboliang/spark,lvdongr/spark,goldmedal/spark,ajaysaini725/spark,sahilTakiar/spark,jiangxb1987/spark,yanboliang/spark,SHASHANKB/spark,michalsenkyr/spark,tengpeng/spark,ahnqirage/spark,esi-mineset/spark,adrian-ionescu/apache-spark,bdrillard/spark,ddna1021/spark,janewangfb/spark,cin/spark,holdenk/spark,cloud-fan/spark,JoshRosen/spark,zero323/spark,caneGuy/spark,rednaxelafx/apache-spark,lxsmnv/spark,tejasapatil/spark,wzhfy/spark,jkbradley/spark,wzhfy/spark,HyukjinKwon/spark,witgo/spark,ddna1021/spark,aosagie/spark,debugger87/spark,shuangshuangwang/spark,akopich/spark,yanboliang/spark,akopich/spark,hvanhovell/spark,ericvandenbergfb/spark,esi-mineset/spark,actuaryzhang/spark,chuckchen/spark,chuckchen/spark,vinodkc/spark,rezasafi/spark,BryanCutler/spark,spark-test/spark,bravo-zhang/spark,JoshRosen/spark,ueshin/apache-spark,byakuinss/spark,mahak/spark,ahnqirage/spark,highfei2011/spark,rikima/spark,taroplus/spark,1haodian/spark,stanzhai/spark,pgandhi999/spark,spark-test/spark,xflin/spark,rekhajoshm/spark,alunarbeach/spark,1haodian/spark,darionyaphet/spark,joseph-torres/spark,narahari92/spark,ericvandenbergfb/spark,rikima/spark,nlalevee/spark,ptkool/spark,jiangxb1987/spark,akopich/spark,wangyum/spark,HyukjinKwon/spark,hvanhovell/spark,xuanyuanking/spark,shaneknapp/spark,srowen/spark,spark-test/spark,shuangshuangwang/spark,byakuinss/spark,nilsgrabbert/spark,shubhamchopra/spark,holdenk/spark,stanzhai/spark,nilsgrabbert/spark,rekhajoshm/spark,caneGuy/spark,ioana-delaney/spark,kiszk/spark,LantaoJin/spark,icexelloss/spark,spark-test/spark,LantaoJin/spark,JoshRosen/spark,dongjoon-hyun/spark,guoxiaolongzte/spark,yanboliang/spark,aray/spark,sahilTakiar/spark,someorz/spark,nilsgrabbert/spark,chuckchen/spark,spark-test/spark,techaddict/spark,brad-kaiser/spark,shubhamchopra/spark,WeichenXu123/spark,chuckchen/spark,hvanhovell/spark,ericvandenbergfb/spark,apache/spark,srowen/spark,markhamstra/spark,maropu/spark,dongjoon-hyun/spark,guoxiaolongzte/spark,WindCanDie/spark,facaiy/spark,pgandhi999/spark,caneGuy/spark,skonto/spark,gengliangwang/spark,janewangfb/spark,kiszk/spark,wangyum/spark,milliman/spark,markhamstra/spark,ptkool/spark,srowen/spark,ron8hu/spark,janewangfb/spark,vinodkc/spark,wzhfy/spark,wangmiao1981/spark,minixalpha/spark,BryanCutler/spark,sureshthalamati/spark,witgo/spark,bdrillard/spark,michalsenkyr/spark,apache/spark,hhbyyh/spark,mdespriee/spark,kevinyu98/spark,wzhfy/spark,zzcclp/spark,bravo-zhang/spark,holdenk/spark,jiangxb1987/spark,xflin/spark,facaiy/spark,ueshin/apache-spark,hhbyyh/spark,lxsmnv/spark,michalsenkyr/spark,rezasafi/spark,rednaxelafx/apache-spark,lvdongr/spark,nchammas/spark,debugger87/spark,aray/spark,brad-kaiser/spark,markhamstra/spark,rekhajoshm/spark,matthewfranglen/spark,cloud-fan/spark,BryanCutler/spark,adrian-ionescu/apache-spark,milliman/spark,ajaysaini725/spark,hhbyyh/spark,debugger87/spark,witgo/spark,zzcclp/spark,markhamstra/spark,lvdongr/spark,facaiy/spark,SHASHANKB/spark,janewangfb/spark,cloud-fan/spark,rednaxelafx/apache-spark,ConeyLiu/spark,LantaoJin/spark,aosagie/spark,michalsenkyr/spark,ioana-delaney/spark,narahari92/spark,nchammas/spark,Aegeaner/spark,mike0sv/spark,cin/spark,shaneknapp/spark,maropu/spark,ahnqirage/spark,WeichenXu123/spark,vinodkc/spark,pgandhi999/spark,eyalfa/spark,shuangshuangwang/spark,ahnqirage/spark,dbtsai/spark,JoshRosen/spark,1haodian/spark,ddna1021/spark,taroplus/spark,nlalevee/spark,ericvandenbergfb/spark,kiszk/spark,alunarbeach/spark,bdrillard/spark,bravo-zhang/spark,guoxiaolongzte/spark,alunarbeach/spark,vinodkc/spark,brad-kaiser/spark,xflin/spark,caneGuy/spark,Aegeaner/spark,techaddict/spark,saltstar/spark,zuotingbing/spark,mdespriee/spark,ioana-delaney/spark,esi-mineset/spark,highfei2011/spark,techaddict/spark,cin/spark,ron8hu/spark,shubhamchopra/spark,stanzhai/spark,tejasapatil/spark,LantaoJin/spark,mdespriee/spark,szhem/spark,nilsgrabbert/spark,hvanhovell/spark,lvdongr/spark,rednaxelafx/apache-spark,aray/spark,mike0sv/spark,zuotingbing/spark,ConeyLiu/spark,tengpeng/spark,vinodkc/spark,skonto/spark,brad-kaiser/spark,nchammas/spark,shaneknapp/spark,SHASHANKB/spark,ptkool/spark,ueshin/apache-spark,taroplus/spark,maropu/spark,janewangfb/spark,goldmedal/spark,zzcclp/spark,nlalevee/spark,hhbyyh/spark,lvdongr/spark,lxsmnv/spark,adrian-ionescu/apache-spark,apache/spark,szhem/spark,mahak/spark