Remove useless class constants.
Remove useless class constants.

johnhelmuth/predis,RudyJessop/predis,zhangyancoder/predis,quangnguyen90/predis,SecureCloud-biz/predis,vend/predis,mrkeng/predis,SwelenFrance/predis,lvbaosong/predis,nrk/predis,stokes3452/predis,moria/predis,oswaldderiemaecker/predis,nguyenthaihan/predis,gopalindians/predis,protomouse/predis,CloudSide/predis,dzung2t/predis,gencer/predis,WalterShe/predis