executor: remove filter exec. (#2037)
executor: remove filter exec. (#2037)


mccxj/tidb,kyle-wang/tidb,Nify/tidb,yuanwhy/tidb,simon-xia/tidb,liyu4/tidb,gaocegege/tidb,qiuyesuifeng/tidb,qhsong/tidb,Nify/tidb,spongedu/tidb,c4pt0r/tidb,andelf/tidb,c4pt0r/tidb,silenceper/tidb,c4pt0r/tidb,zimulala/tidb,kyle-wang/tidb,astaxie/tidb,mccxj/tidb,coocood/tidb,qhsong/tidb,EvilMcJerkface/tidb,anywhy/tidb,louishust/tidb,zs634134578/tidb,Cofyc/tidb,pingcap/tidb,ngaut/tidb,myrice/tidb,CodeRushing/tidb,kyle-wang/tidb,pingcap/tidb,silenceper/tidb,ngaut/tidb,andelf/tidb,JinheLin/tidb,c4pt0r/tidb,myrice/tidb,JinheLin/tidb,8cbx/tidb,kyle-wang/tidb,yangwenmai/tidb,ueizhou/tidb,pingcap/tidb,ngaut/tidb,pingcap/tidb,ngaut/tidb,silentred/tidb,tiancaiamao/tidb,kyle-wang/tidb,ming-relax/tidb,ming-relax/tidb,wusphinx/tidb,XuHuaiyu/tidb,spongedu/tidb,anywhy/tidb,kyle-wang/tidb,c4pt0r/tidb,coocood/tidb,louishust/tidb,pingcap/tidb,simon-xia/tidb,CodeRushing/tidb,pingcap/tidb,zimulala/tidb,Cofyc/tidb,c4pt0r/tidb,EvilMcJerkface/tidb,yangwenmai/tidb,gaocegege/tidb,XuHuaiyu/tidb,silentred/tidb,ngaut/tidb,zs634134578/tidb,liyu4/tidb,cosmtrek/tidb,astaxie/tidb,qiuyesuifeng/tidb,ueizhou/tidb,tiancaiamao/tidb,yuanwhy/tidb,ngaut/tidb,wusphinx/tidb,8cbx/tidb,cosmtrek/tidb