0.2.7.6
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* **Update:** Removed ``TimeLog._expand_task_schedule_timing()`` method which
  was automatically adjusting the ``schedule_timing`` and ``schedule_unit`` of
  a Task to total duration of the TimeLogs of that particular task, thus
  increasing the schedule info with the entered time logs.

  But it was setting the ``schedule_timing`` to 0 in some certain cases and it
  was unnecessary because the main purpose of this method was to prevent
  TaskJuggler to raise any errors related to the inconsistencies between the
  schedule values and the duration of TimeLogs and TaskJuggler has never given
  a real error about that situation.