Remove unused variable 'command'

Triggers F841 local variable 'command' is assigned to but never used
instead (with newer pyflakes)

Change-Id: I2ed56c53d4e4720d87fcce87b21180d4aa8dfc7b
Fix import grouping

(enforced by Hacking >= 0.9.0)

Change-Id: I2288d1305e9212bb69dfc76d46d3e16ef0629ff8