Remove unused columns_query.
Remove unused columns_query.

danieljwest/mycli,MnO2/rediscli,shoma/mycli,qbdsoft/mycli,evook/mycli,mdsrosa/mycli,adamchainz/mycli,nkhuyu/mycli,MnO2/rediscli,fw1121/mycli,oguzy/mycli,webwlsong/mycli,douglasvegas/mycli,tkuipers/mycli,shoma/mycli,shaunstanislaus/mycli,suzukaze/mycli,ksmaheshkumar/mycli,ZuoGuocai/mycli,webwlsong/mycli,martijnengler/mycli,suzukaze/mycli,adamchainz/mycli,j-bennet/mycli,mattn/mycli,shaunstanislaus/mycli,jinstrive/mycli,ksmaheshkumar/mycli,brewneaux/mycli,thanatoskira/mycli,tkuipers/mycli,mattn/mycli,nkhuyu/mycli,chenpingzhao/mycli,douglasvegas/mycli,qbdsoft/mycli,ZuoGuocai/mycli,oguzy/mycli,danieljwest/mycli,fw1121/mycli,j-bennet/mycli,brewneaux/mycli,jinstrive/mycli,mdsrosa/mycli,D-e-e-m-o/mycli,evook/mycli,martijnengler/mycli,D-e-e-m-o/mycli,chenpingzhao/mycli,thanatoskira/mycli