kv: remove the useless field of `snapshot` (#10276)
kv: remove the useless field of `snapshot` (#10276)


EvilMcJerkface/tidb,ngaut/tidb,EvilMcJerkface/tidb,pingcap/tidb,c4pt0r/tidb,pingcap/tidb,pingcap/tidb,cosmtrek/tidb,ngaut/tidb,ming-relax/tidb,c4pt0r/tidb,coocood/tidb,kyle-wang/tidb,qiuyesuifeng/tidb,ngaut/tidb,c4pt0r/tidb,ngaut/tidb,kyle-wang/tidb,XuHuaiyu/tidb,coocood/tidb,XuHuaiyu/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,kyle-wang/tidb,pingcap/tidb,kyle-wang/tidb,kyle-wang/tidb,qiuyesuifeng/tidb,c4pt0r/tidb,ming-relax/tidb,c4pt0r/tidb,Cofyc/tidb,ngaut/tidb,cosmtrek/tidb,Cofyc/tidb,kyle-wang/tidb,c4pt0r/tidb