clear the tiler for input region after setting to comp object.
clear the tiler for input region after setting to comp object.

Summary:
there is no need to set repeatedly input region even if it's already applied.
and this patch remove the code to clear tiler from client's unmapped case.
this fixes that tiler for input region is removed before applying it to comp object in case client is unmmaped yet.

Reviewers: devilhorns, zmike

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D3076

rvandegrift/e,rvandegrift/e,tasn/enlightenment,tasn/enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment