Remove references to the `sel` object in shell.rst
Remove references to the `sel` object in shell.rst

The current documentation has references to the deprecated `sel` when interacting with the shell. I've removed them and replaced uses of `sel.xpath` with `response.xpath` instead.
GregoryVigoTorres/scrapy,agreen/scrapy,wenyu1001/scrapy,heamon7/scrapy,yarikoptic/scrapy,Ryezhang/scrapy,kashyap32/scrapy,hwsyy/scrapy,carlosp420/scrapy,kashyap32/scrapy,cyberplant/scrapy,agusc/scrapy,moraesnicol/scrapy,jeffreyjinfeng/scrapy,zhangtao11/scrapy,fqul/scrapy,godfreyy/scrapy,crasker/scrapy,OpenWhere/scrapy,cleydson/scrapy,yidongliu/scrapy,wzyuliyang/scrapy,livepy/scrapy,profjrr/scrapy,ArturGaspar/scrapy,pranjalpatil/scrapy,wenyu1001/scrapy,amboxer21/scrapy,1yvT0s/scrapy,kalessin/scrapy,kimimj/scrapy,rolando-contrib/scrapy,URXtech/scrapy,farhan0581/scrapy,Slater-Victoroff/scrapy,rolando/scrapy,nowopen/scrapy,YeelerG/scrapy,JacobStevenR/scrapy,nguyenhongson03/scrapy,jdemaeyer/scrapy,mgedmin/scrapy,1yvT0s/scrapy,profjrr/scrapy,rklabs/scrapy,tliber/scrapy,songfj/scrapy,elijah513/scrapy,Geeglee/scrapy,kalessin/scrapy,wzyuliyang/scrapy,curita/scrapy,jc0n/scrapy,tntC4stl3/scrapy,xiao26/scrapy,TarasRudnyk/scrapy,tagatac/scrapy,dracony/scrapy,kalessin/scrapy,pawelmhm/scrapy,ssh-odoo/scrapy,kazitanvirahsan/scrapy,starrify/scrapy,bmess/scrapy,nowopen/scrapy,cyrixhero/scrapy,moraesnicol/scrapy,nguyenhongson03/scrapy,jc0n/scrapy,dangra/scrapy,shaform/scrapy,webmakin/scrapy,scrapy/scrapy,Adai0808/scrapy-1,GregoryVigoTorres/scrapy,csalazar/scrapy,w495/scrapy,wangjun/scrapy,cleydson/scrapy,mgedmin/scrapy,huoxudong125/scrapy,livepy/scrapy,Geeglee/scrapy,jiezhu2007/scrapy,ssteo/scrapy,shaform/scrapy,raphaelfruneaux/scrapy,nfunato/scrapy,avtoritet/scrapy,Digenis/scrapy,haiiiiiyun/scrapy,elacuesta/scrapy,ssteo/scrapy,snowdream1314/scrapy,haiiiiiyun/scrapy,songfj/scrapy,pablohoffman/scrapy,ylcolala/scrapy,Zephor5/scrapy,Zephor5/scrapy,Lucifer-Kim/scrapy,huoxudong125/scrapy,bmess/scrapy,nikgr95/scrapy,godfreyy/scrapy,scrapy/scrapy,snowdream1314/scrapy,dangra/scrapy,fontenele/scrapy,ssh-odoo/scrapy,agusc/scrapy,eLRuLL/scrapy,haiiiiiyun/scrapy,rolando/scrapy,famorted/scrapy,CodeJuan/scrapy,tagatac/scrapy,nguyenhongson03/scrapy,starrify/scrapy,1yvT0s/scrapy,pawelmhm/scrapy,hansenDise/scrapy,agreen/scrapy,aivarsk/scrapy,IvanGavran/scrapy,amboxer21/scrapy,umrashrf/scrapy,hwsyy/scrapy,rootAvish/scrapy,dangra/scrapy,cleydson/scrapy,mlyundin/scrapy,Chenmxs/scrapy,tagatac/scrapy,taito/scrapy,zjuwangg/scrapy,godfreyy/scrapy,barraponto/scrapy,zackslash/scrapy,dacjames/scrapy,fontenele/scrapy,smaty1/scrapy,zjuwangg/scrapy,fafaman/scrapy,yarikoptic/scrapy,crasker/scrapy,rootAvish/scrapy,Lucifer-Kim/scrapy,stenskjaer/scrapy,kmike/scrapy,AaronTao1990/scrapy,songfj/scrapy,jdemaeyer/scrapy,darkrho/scrapy-scrapy,nowopen/scrapy,elijah513/scrapy,kazitanvirahsan/scrapy,codebhendi/scrapy,finfish/scrapy,lacrazyboy/scrapy,olafdietsche/scrapy,JacobStevenR/scrapy,moraesnicol/scrapy,CodeJuan/scrapy,Parlin-Galanodel/scrapy,JacobStevenR/scrapy,liyy7/scrapy,legendtkl/scrapy,pombredanne/scrapy,Allianzcortex/scrapy,nikgr95/scrapy,jiezhu2007/scrapy,bmess/scrapy,Lucifer-Kim/scrapy,Timeship/scrapy,scorphus/scrapy,Digenis/scrapy,zhangtao11/scrapy,Djlavoy/scrapy,dgillis/scrapy,jc0n/scrapy,arush0311/scrapy,zorojean/scrapy,dgillis/scrapy,fafaman/scrapy,mgedmin/scrapy,Slater-Victoroff/scrapy,fpy171/scrapy,Cnfc19932/scrapy,Bourneer/scrapy,Zephor5/scrapy,amboxer21/scrapy,tliber/scrapy,zorojean/scrapy,jeffreyjinfeng/scrapy,YeelerG/scrapy,irwinlove/scrapy,rklabs/scrapy,ylcolala/scrapy,hansenDise/scrapy,lacrazyboy/scrapy,WilliamKinaan/scrapy,ENjOyAbLE1991/scrapy,cursesun/scrapy,wenyu1001/scrapy,taito/scrapy,jdemaeyer/scrapy,carlosp420/scrapy,tntC4stl3/scrapy,dracony/scrapy,xiao26/scrapy,rootAvish/scrapy,codebhendi/scrapy,umrashrf/scrapy,taito/scrapy,ENjOyAbLE1991/scrapy,olorz/scrapy,darkrho/scrapy-scrapy,wujuguang/scrapy,ArturGaspar/scrapy,redapple/scrapy,Bourneer/scrapy,hyrole/scrapy,foromer4/scrapy,AaronTao1990/scrapy,kmike/scrapy,zackslash/scrapy,kmike/scrapy,fafaman/scrapy,fpy171/scrapy,fqul/scrapy,olafdietsche/scrapy,scorphus/scrapy,URXtech/scrapy,legendtkl/scrapy,yarikoptic/scrapy,eLRuLL/scrapy,johnardavies/scrapy,famorted/scrapy,kimimj/scrapy,KublaikhanGeek/scrapy,WilliamKinaan/scrapy,pombredanne/scrapy,z-fork/scrapy,zhangtao11/scrapy,elijah513/scrapy,pombredanne/scrapy,hansenDise/scrapy,scorphus/scrapy,ArturGaspar/scrapy,eliasdorneles/scrapy,raphaelfruneaux/scrapy,elacuesta/scrapy,dgillis/scrapy,github-account-because-they-want-it/scrapy,pablohoffman/scrapy,csalazar/scrapy,shaform/scrapy,mlyundin/scrapy,wangjun/scrapy,AaronTao1990/scrapy,rahulsharma1991/scrapy,eLRuLL/scrapy,KublaikhanGeek/scrapy,agreen/scrapy,curita/scrapy,jiezhu2007/scrapy,agusc/scrapy,hectoruelo/scrapy,Timeship/scrapy,Bourneer/scrapy,Adai0808/scrapy-1,cyberplant/scrapy,WilliamKinaan/scrapy,nfunato/scrapy,Djlavoy/scrapy,elacuesta/scrapy,mlyundin/scrapy,heamon7/scrapy,z-fork/scrapy,cyberplant/scrapy,OpenWhere/scrapy,aivarsk/scrapy,coderabhishek/scrapy,cursesun/scrapy,zjuwangg/scrapy,hbwzhsh/scrapy,tntC4stl3/scrapy,rahulsharma1991/scrapy,Cnfc19932/scrapy,kimimj/scrapy,dacjames/scrapy,zorojean/scrapy,Slater-Victoroff/scrapy,stenskjaer/scrapy,TarasRudnyk/scrapy,rolando/scrapy,KublaikhanGeek/scrapy,scrapy/scrapy,pfctdayelise/scrapy,Ryezhang/scrapy,webmakin/scrapy,cyrixhero/scrapy,finfish/scrapy,livepy/scrapy,profjrr/scrapy,hyrole/scrapy,Geeglee/scrapy,yidongliu/scrapy,Allianzcortex/scrapy,kazitanvirahsan/scrapy,wangjun/scrapy,redapple/scrapy,ssteo/scrapy,barraponto/scrapy,avtoritet/scrapy,CodeJuan/scrapy,redapple/scrapy,Digenis/scrapy,yusofm/scrapy,carlosp420/scrapy,avtoritet/scrapy,TarasRudnyk/scrapy,OpenWhere/scrapy,finfish/scrapy,nikgr95/scrapy,codebhendi/scrapy,pawelmhm/scrapy,pfctdayelise/scrapy,zackslash/scrapy,Preetwinder/scrapy,Ryezhang/scrapy,Parlin-Galanodel/scrapy,darkrho/scrapy-scrapy,fpy171/scrapy,ssh-odoo/scrapy,famorted/scrapy,pranjalpatil/scrapy,legendtkl/scrapy,rolando-contrib/scrapy,Cnfc19932/scrapy,IvanGavran/scrapy,dacjames/scrapy,olorz/scrapy,pranjalpatil/scrapy,snowdream1314/scrapy,coderabhishek/scrapy,URXtech/scrapy,GregoryVigoTorres/scrapy,eliasdorneles/scrapy,hectoruelo/scrapy,nfunato/scrapy,hyrole/scrapy,ylcolala/scrapy,Preetwinder/scrapy,farhan0581/scrapy,raphaelfruneaux/scrapy,hectoruelo/scrapy,github-account-because-they-want-it/scrapy,olafdietsche/scrapy,hbwzhsh/scrapy,foromer4/scrapy,starrify/scrapy,johnardavies/scrapy,johnardavies/scrapy,z-fork/scrapy,Parlin-Galanodel/scrapy,tliber/scrapy,Timeship/scrapy,arush0311/scrapy,irwinlove/scrapy,hbwzhsh/scrapy,smaty1/scrapy,rklabs/scrapy,YeelerG/scrapy,webmakin/scrapy,liyy7/scrapy,aivarsk/scrapy,eliasdorneles/scrapy,jeffreyjinfeng/scrapy,Adai0808/scrapy-1,github-account-because-they-want-it/scrapy,curita/scrapy,rolando-contrib/scrapy,coderabhishek/scrapy,pablohoffman/scrapy,w495/scrapy,stenskjaer/scrapy,cursesun/scrapy,Allianzcortex/scrapy,fontenele/scrapy,w495/scrapy,farhan0581/scrapy,Preetwinder/scrapy,lacrazyboy/scrapy,wzyuliyang/scrapy,huoxudong125/scrapy,xiao26/scrapy,kashyap32/scrapy,wujuguang/scrapy,wujuguang/scrapy,hwsyy/scrapy,heamon7/scrapy,Djlavoy/scrapy,smaty1/scrapy,cyrixhero/scrapy,fqul/scrapy,csalazar/scrapy,rahulsharma1991/scrapy,yusofm/scrapy,arush0311/scrapy,liyy7/scrapy,barraponto/scrapy,umrashrf/scrapy,Chenmxs/scrapy,irwinlove/scrapy,pfctdayelise/scrapy,foromer4/scrapy,Chenmxs/scrapy,yusofm/scrapy,crasker/scrapy,ENjOyAbLE1991/scrapy,dracony/scrapy,olorz/scrapy,yidongliu/scrapy,IvanGavran/scrapy