kubeadm: drop explicit constant override in version test
kubeadm: drop explicit constant override in version test

The k8s release bucket constant is not longer overriden in network tests
because the fetcher is mocked rather than using httptest.NewServer. See
previous implementation in
https://github.com/kubernetes/kubernetes/pull/49119/files#diff-82f2b09991047d4a1884d53dedadd64a473d5c4dc75293514e71773ceedf08e2R128

Signed-off-by: hasheddan <fff88e83cd964a817f9e74a48f8df9cd0b6b9759@gmail.com>

monopole/kubernetes,liggitt/kubernetes,mikedanese/kubernetes,micahhausler/kubernetes,jingxu97/kubernetes,roberthbailey/kubernetes,mahak/kubernetes,k82/kubernetes,nckturner/kubernetes,hex108/kubernetes,GulajavaMinistudio/kubernetes,fabriziopandini/kubernetes,PiotrProkop/kubernetes,joelsmith/kubernetes,kpgriffith/kubernetes,kevin-wangzefeng/kubernetes,csrwng/kubernetes,deads2k/kubernetes,fanzhangio/kubernetes,kubernetes/kubernetes,PiotrProkop/kubernetes,chestack/kubernetes,li-ang/kubernetes,carlory/kubernetes,nak3/kubernetes,hex108/kubernetes,kpgriffith/kubernetes,andrewrynhard/kubernetes,hex108/kubernetes,saad-ali/kubernetes,krmayankk/kubernetes,shyamjvs/kubernetes,rrati/kubernetes,mikebrow/kubernetes,gnufied/kubernetes,jessfraz/kubernetes,xychu/kubernetes,chestack/kubernetes,BenTheElder/kubernetes,ii/kubernetes,BenTheElder/kubernetes,alejandroEsc/kubernetes,fanzhangio/kubernetes,dims/kubernetes,xychu/kubernetes,micahhausler/kubernetes,zhouhaibing089/kubernetes,GulajavaMinistudio/kubernetes,wongma7/kubernetes,carlory/kubernetes,jackfrancis/kubernetes,hex108/kubernetes,dixudx/kubernetes,zhangmingld/kubernetes,yujuhong/kubernetes,spzala/kubernetes,bparees/kubernetes,mkumatag/kubernetes,monopole/kubernetes,openshift/kubernetes,fanzhangio/kubernetes,x13n/kubernetes,openshift/kubernetes,alejandroEsc/kubernetes,csrwng/kubernetes,spzala/kubernetes,thockin/kubernetes,mosoft521/kubernetes,mikedanese/kubernetes,pires/kubernetes,wongma7/kubernetes,aledbf/kubernetes,Acidburn0zzz/kubernetes,jsafrane/kubernetes,Acidburn0zzz/kubernetes,matthyx/kubernetes,liggitt/kubernetes,verult/kubernetes,brendandburns/kubernetes,gnufied/kubernetes,jingxu97/kubernetes,jdef/kubernetes,feiskyer/kubernetes,joelsmith/kubernetes,rnaveiras/kubernetes,bparees/kubernetes,stevesloka/kubernetes,matthyx/kubernetes,tpepper/kubernetes,linux-on-ibm-z/kubernetes,mkumatag/kubernetes,xychu/kubernetes,weiwei04/kubernetes,cblecker/kubernetes,xlgao-zju/kubernetes,iterion/kubernetes,idvoretskyi/kubernetes,kitt1987/kubernetes,deads2k/kubernetes,krmayankk/kubernetes,rafax/kubernetes,linux-on-ibm-z/kubernetes,zhangmingld/kubernetes,iameli/kubernetes,lojies/kubernetes,kubernetes/kubernetes,sdminonne/kubernetes,cofyc/kubernetes,xlgao-zju/kubernetes,aledbf/kubernetes,jessfraz/kubernetes,coolsvap/kubernetes,stevesloka/kubernetes,x13n/kubernetes,deads2k/kubernetes,warmchang/kubernetes,li-ang/kubernetes,roberthbailey/kubernetes,cmluciano/kubernetes,cmluciano/kubernetes,rrati/kubernetes,chrislovecnm/kubernetes,rafax/kubernetes,jagosan/kubernetes,liggitt/kubernetes,Clarifai/kubernetes,mfojtik/kubernetes,mikedanese/kubernetes,olivierlemasle/kubernetes,sanjeevm0/kubernetes,nak3/kubernetes,wongma7/kubernetes,zhouhaibing089/kubernetes,mahak/kubernetes,kpgriffith/kubernetes,Acidburn0zzz/kubernetes,brendandburns/kubernetes,Clarifai/kubernetes,verult/kubernetes,thockin/kubernetes,PI-Victor/kubernetes,humblec/kubernetes,lojies/kubernetes,mikedanese/kubernetes,mosoft521/kubernetes,ravilr/kubernetes,liggitt/kubernetes,spzala/kubernetes,PiotrProkop/kubernetes,jsafrane/kubernetes,ingvagabund/kubernetes,enj/kubernetes,ping035627/kubernetes,chrislovecnm/kubernetes,PI-Victor/kubernetes,li-ang/kubernetes,jessfraz/kubernetes,csrwng/kubernetes,joelsmith/kubernetes,jagosan/kubernetes,MikeSpreitzer/kubernetes,fanzhangio/kubernetes,rnaveiras/kubernetes,xlgao-zju/kubernetes,zhangmingld/kubernetes,jsafrane/kubernetes,ping035627/kubernetes,andrewrynhard/kubernetes,mengqiy/kubernetes,soltysh/kubernetes,ravilr/kubernetes,jackfrancis/kubernetes,hex108/kubernetes,linux-on-ibm-z/kubernetes,mkumatag/kubernetes,wongma7/kubernetes,roberthbailey/kubernetes,aledbf/kubernetes,k82/kubernetes,nckturner/kubernetes,idvoretskyi/kubernetes,GulajavaMinistudio/kubernetes,ingvagabund/kubernetes,zhangmingld/kubernetes,mikebrow/kubernetes,coolsvap/kubernetes,cblecker/kubernetes,cmluciano/kubernetes,mikebrow/kubernetes,dlorenc/kubernetes,saad-ali/kubernetes,idvoretskyi/kubernetes,shyamjvs/kubernetes,kpgriffith/kubernetes,tengqm/kubernetes,nikhita/kubernetes,PI-Victor/kubernetes,x13n/kubernetes,humblec/kubernetes,enj/kubernetes,nak3/kubernetes,bparees/kubernetes,chrislovecnm/kubernetes,weiwei04/kubernetes,monopole/kubernetes,mkumatag/kubernetes,ingvagabund/kubernetes,sdminonne/kubernetes,x13n/kubernetes,jessfraz/kubernetes,verb/kubernetes,warmchang/kubernetes,dims/kubernetes,enj/kubernetes,gnufied/kubernetes,tpepper/kubernetes,matthyx/kubernetes,zhouhaibing089/kubernetes,ping035627/kubernetes,PiotrProkop/kubernetes,rafax/kubernetes,coolsvap/kubernetes,nikhita/kubernetes,verult/kubernetes,iterion/kubernetes,fanzhangio/kubernetes,mahak/kubernetes,k82/kubernetes,enj/kubernetes,liggitt/kubernetes,kitt1987/kubernetes,carlory/kubernetes,Clarifai/kubernetes,humblec/kubernetes,deads2k/kubernetes,fabriziopandini/kubernetes,jingxu97/kubernetes,weiwei04/kubernetes,kevin-wangzefeng/kubernetes,iterion/kubernetes,matthyx/kubernetes,pires/kubernetes,jdef/kubernetes,dlorenc/kubernetes,andrewrynhard/kubernetes,cofyc/kubernetes,k82/k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