store/tikv/mocktikv: remove useless code (#5337)
store/tikv/mocktikv: remove useless code (#5337)


cosmtrek/tidb,yangwenmai/tidb,Cofyc/tidb,XuHuaiyu/tidb,c4pt0r/tidb,Nify/tidb,pingcap/tidb,ngaut/tidb,coocood/tidb,c4pt0r/tidb,c4pt0r/tidb,kyle-wang/tidb,EvilMcJerkface/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb,CodeRushing/tidb,pingcap/tidb,yangwenmai/tidb,kyle-wang/tidb,EvilMcJerkface/tidb,spongedu/tidb,kyle-wang/tidb,c4pt0r/tidb,ngaut/tidb,qiuyesuifeng/tidb,tiancaiamao/tidb,ming-relax/tidb,wusphinx/tidb,CodeRushing/tidb,mccxj/tidb,XuHuaiyu/tidb,mccxj/tidb,pingcap/tidb,kyle-wang/tidb,wusphinx/tidb,pingcap/tidb,Nify/tidb,ngaut/tidb,Cofyc/tidb,tiancaiamao/tidb,qiuyesuifeng/tidb,pingcap/tidb,ngaut/tidb,spongedu/tidb,cosmtrek/tidb,kyle-wang/tidb,ngaut/tidb,coocood/tidb,ming-relax/tidb,c4pt0r/tidb,ngaut/tidb