ecore: get rid of commands in efl_task.

ecore: get rid of commands in efl_task.

Note that the usage in efl_thread.c should and could be removed.
the problem with its usage is that when the ARGUMENTS event is fired,
noone ever had the chance to subscribe to the loop of the thread yet. So
all in all this is unneccessary, since noone could ever touch that.

Differential Revision: https://phab.enlightenment.org/D7517