remove unused variables
remove unused variables

emodeqidao/sqlcipher,Mozhuowen/sqlcipher,emodeqidao/sqlcipher,bestofsong/sqlcipher,supriyantomaftuh/sqlcipher,shanshan1026/sqlcipher,luis-allan/sqlcipher,Mozhuowen/sqlcipher,cnbin/sqlcipher,Mozhuowen/sqlcipher,hongbinz/sqlcipher,emodeqidao/sqlcipher,bestofsong/sqlcipher,hongbinz/sqlcipher,shanshan1026/sqlcipher,hongbinz/sqlcipher,supriyantomaftuh/sqlcipher,ylfonline/sqlcipher,RAN-II/sqlcipher,ylfonline/sqlcipher,RAN-II/sqlcipher,supriyantomaftuh/sqlcipher,pandazheng/sqlcipher,cnbin/sqlcipher,shanshan1026/sqlcipher,bestofsong/sqlcipher,pandazheng/sqlcipher,pandazheng/sqlcipher,shanshan1026/sqlcipher,ylfonline/sqlcipher,cnbin/sqlcipher,RAN-II/sqlcipher,luis-allan/sqlcipher,luis-allan/sqlcipher