Code review comment for lp:~carla-sella/ubuntu-calendar-app/calendar-app

pyflakes reports 4 warnings, all of them easily fixable by just removing unused code:

tests/autopilot/calendar_app/tests/test_calendar.py:17: 'unittest' imported but unused
tests/autopilot/calendar_app/tests/test_calendar.py:47: local variable 'end_time_field' is assigned to but never used
tests/autopilot/calendar_app/tests/test_calendar.py:82: local variable 'minutesBeforeChange' is assigned to but never used
tests/autopilot/calendar_app/tests/test_calendar.py:120: local variable 'title_label' is assigned to but never used