oci/namespace: remove unnecessary variable idx
oci/namespace: remove unnecessary variable idx

Signed-off-by: Ma Shimiao <4511f16e942ad3568742865d09c9060c1d8bebb9@cn.fujitsu.com>

mstanleyjones/docker,madhanrm/docker,miminar/docker,dsheets/moby,trebonian/docker,nalind/docker,naveed-jamil-tenpearls/moby,duglin/docker,allencloud/docker,catinthesky/docker,michael-holzheu/docker,nawawi/docker,tophj-ibm/moby,akira-baruah/docker,madhanrm/docker,thaJeztah/docker,flavio/docker,whuwxl/docker,moul/docker,scotttlin/docker,unclejack/docker,tophj-ibm/docker,dims/docker,thtanaka/docker,YuPengZTE/docker,bearstech/moby,prertik/docker,yasiramin10p/moby,bonczj/moby-json-file-logger,KingEmet/docker,duglin/docker,dsheets/moby,mikebrow/docker,Ramzec/docker,justincormack/docker,mkumatag/docker,AkihiroSuda/docker,pradipd/moby,jameszhan/docker,catinthesky/docker,darrenstahlmsft/moby,rhatdan/docker,Mokolea/docker,justincormack/docker,gnailuy/docker,cyphar/docker,sdurrheimer/docker,jvanz/docker,yasiramin10p/moby,jlhawn/docker,coreos/docker,sterchelen/docker,yummypeng/docker,tophj-ibm/docker,darrenstahlmsft/docker,darrenstahlmsft/moby,pramodhkp/moby,dmcgowan/docker,docker/docker,kolyshkin/moby,noironetworks/docker,alfred-landrum/docker,laijs/docker,kolyshkin/moby,mtesselH/docker,nawawi/docker,yongtang/docker,docker/docker,PatrickLang/moby,q384566678/docker,Mokolea/docker,kolyshkin/moby,Syntaxide/docker,cpuguy83/docker,rhatdan/docker,cpuguy83/docker,coreos/docker,xuxinkun/docker,darrenstahlmsft/docker,duglin/docker,yosifkit/docker,hqhq/moby,sterchelen/docker,ffoysal/docker,madhanrm/docker,yosifkit/docker,thtanaka/docker,moul/docker,tonistiigi/docker,JMesser81/docker,x1022as/docker,Syntaxide/docker,tmp6154/docker,coreos/docker,thaJeztah/docker,KarthikNayak/docker,mikedougherty/docker,jwhonce/docker,kolyshkin/docker,jvanz/docker,justincormack/docker,thaJeztah/docker,x1022as/docker,ibuildthecloud/docker,thtanaka/docker,mstanleyjones/docker,jimjag/docker,miminar/docker,JMesser81/docker,erikh/docker,dccurtis/docker,dmcgowan/docker,dperny/docker,resin-io/docker,nalind/docker,erikstmartin/docker,laijs/moby,crosbymichael/docker,AkihiroSuda/docker,ripcurld0/moby,jwhonce/docker,tianon/docker,tonistiigi/docker,unclejack/docker,pradipd/moby,allencloud/docker,tklauser/docker,liaoqingwei/docker,dperny/docker,alfred-landrum/docker,diogomonica/docker,mahak/docker,mahak/docker,dperny/docker,kolyshkin/docker,prertik/docker,HideoYamauchi/docker,laijs/moby,diogomonica/docker,yosifkit/docker,tianon/docker,jimjag/docker,catinthesky/docker,ripcurld0/moby,mkumatag/docker,yongtang/docker,jthelin/docker,mahak/docker,jlhawn/docker,q384566678/docker,paralin/docker,moypray/docker,johnstep/moby-moby,laijs/docker,ripcurld0/moby,srust/docker,KingEmet/docker,tklauser/docker,ibuildthecloud/docker,ibuildthecloud/docker,unclejack/docker,ndeloof/docker,estesp/docker,charleszheng44/moby,gnailuy/docker,shhsu/docker,michael-holzheu/docker,kojiromike/docker,Ramzec/docker,kojiromike/docker,jimjag/docker,yosifkit/docker,SvenDowideit/docker,moul/docker,ndeloof/docker,konstruktoid/docker-upstream,bearstech/moby,mike1729/docker,akira-baruah/docker,erikstmartin/docker,liaoqingwei/docker,moby/moby,POLJM242/docker,yummypeng/docker,PatrickLang/moby,HideoYamauchi/docker,whuwxl/docker,fcrisciani/docker,mtesselH/docker,konstruktoid/docker-upstream,amatsus/docker,dccurtis/docker,charleszheng44/moby,shhsu/docker,dgageot/docker,naveed-jamil-tenpearls/moby,fcrisciani/docker,bearstech/moby,tophj-ibm/moby,konstruktoid/docker-1,moby/moby,kojiromike/docker,ColinHebert/docker,ndeloof/docker,moul/docker,charleszheng44/moby,erikstmartin/docker,resin-io/docker,amatsus/docker,moypray/docker,alfred-landrum/docker,paralin/docker,dmcgowan/docker,flavio/docker,ibuildthecloud/docker,imkin/moby,diogomonica/docker,scotttlin/docker,kencochrane/docker,mixja/docker,jlhawn/docker,paralin/docker,sarnautov/moby,cpuguy83/docker,nawawi/docker,imkin/moby,x1022as/docker,trebonian/docker,noironetworks/docker,cpuguy83/docker,sdurrheimer/docker,tophj-ibm/moby,lixiaobing1/docker,michael-holzheu/docker,vdemeester/docker,mikebrow/docker,djs55/docker,kencochrane/docker,AkihiroSuda/docker,Ramzec/docker,coolljt0725/docker,docker/docker,crosbymichael/docker,YuPengZTE/docker,srust/docker,HideoYamauchi/docker,xuxinkun/docker,lixiaobing10051267/docker,tophj-ibm/docker,dccurtis/docker,yongtang/docker,rancher/docker,amatsus/docker,shishir-a412ed/docker,jameszhan/docker,qudongfang/docker,mikedougherty/docker,yummypeng/docker,laijs/docker,haveatry/docker,estesp/docker,gnailuy/docker,liaoqingwei/docker,erikh/docker,jvanz/docker,Syntaxide/docker,tmp6154/docker,lixiaobing10051267/docker,scotttlin/docker,Mokolea/docker,johnstep/moby-moby,KingEmet/docker,estesp/docker,pramodhkp/moby,imkin/moby,rremer/moby,nalind/docker,nawawi/docker,rremer/moby,Ramzec/docker,maxamillion/docker,cyphar/docker,ColinHebert/docker,moby/moby,jthelin/docker,KarthikNayak/docker,YuPengZTE/docker,dgageot/docker,jimjag/docker,xuxinkun/docker,srust/docker,dgageot/docker,paralin/docker,ibuildthecloud/docker,mahak/docker,trebonian/docker,moby/moby,raja-sami-10p/moby,darrenstahlmsft/moby,mixja/docker,qudongfang/docker,lixiaobing1/docker,gschaetz/moby,jameszhan/docker,coolljt0725/docker,lixiaobing1/docker,raja-sami-10p/moby,flavio/docker,konstruktoid/docker-upstream,gjaskiewicz/moby,maxamillion/docker,whuwxl/docker,konstruktoid/docker-1,flavio/docker,laijs/moby,shishir-a412ed/docker,naveed-jamil-tenpearls/moby,shishir-a412ed/docker,Mokolea/docker,mike1729/docker,pramodhkp/moby,mtesselH/docker,mikebrow/docker,dims/docker,hqhq/moby,darrenstahlmsft/docker,raja-sami-10p/moby,vdemeester/docker,bonczj/moby-json-file-logger,fcrisciani/docker,danyalKhaliq10p/moby,coolljt0725/docker,gjaskiewicz/moby,qudongfang/docker,gschaetz/moby,haveatry/docker,maxamillion/docker,tonistiigi/docker,konstruktoid/docker-1,konstruktoid/docker-upstream,shhsu/docker,mikedougherty/docker,AkihiroSuda/docker,haveatry/docker,mstanleyjones/docker,trebonian/docker,bearstech/moby,vdemeester/docker,pradipd/moby,thaJeztah/docker,q384566678/docker,POLJM242/docker,moypray/docker,kencochrane/docker,rancher/docker,gjaskiewicz/moby,dims/docker,sterchelen/docker,rhatdan/docker,djs55/docker,noironetworks/docker,bonczj/moby-json-file-logger,rremer/moby,djs55/docker,sarnautov/moby,gschaetz/moby,erikh/docker,PatrickLang/moby,mixja/docker,ffoysal/docker,allencloud/docker,dsheets/moby,ColinHebert/docker,mike1729/docker,danyalKhaliq10p/moby,ffoysal/docker,lixiaobing10051267/docker,tklauser/docker,resin-io/docker,tmp6154/docker,sdurrheimer/docker,JMesser81/docker,sarnautov/moby,yasiramin10p/moby,prertik/docker,miminar/docker,nalind/docker,hqhq/moby,SvenDowideit/docker,danyalKhaliq10p/moby,KarthikNayak/docker,mkumatag/docker,johnstep/moby-moby,cyphar/docker,SvenDowideit/docker,rancher/docker,gnailuy/docker,jwhonce/docker,crosbymichael/docker