removed unused variables - utils_common.py
removed unused variables - utils_common.py

grandquista/rethinkdb,grandquista/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,robertjpayne/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,grandquista/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,JackieXie168/rethinkdb,jmptrader/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,grandquista/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,jmptrader/rethinkdb,grandquista/rethinkdb,robertjpayne/rethinkdb,grandquista/rethinkdb,JackieXie168/rethinkdb,JackieXie168/rethinkdb,grandquista/rethinkdb,JackieXie168/rethinkdb,JackieXie168/rethinkdb,robertjpayne/rethinkdb,robertjpayne/rethinkdb,JackieXie168/rethinkdb,jmptrader/rethinkdb,JackieXie168/rethinkdb,grandquista/rethinkdb