multibuttonentry: delete clicked signal preventing code when mbe shrinked.

multibuttonentry: delete clicked signal preventing code when mbe shrinked.

Summary:
We don't have event block area in mbe.
Item clicked callback is not called when user clicked the item in mbe shrinked state.
However, item press effect will be shown.

@fix

Test Plan:
Delete the line always calling expanded set API in MBE clicked callback.
Execute MBE sample in elementary_test.
Check the item got a click event but not call the clicked callback.

Reviewers: Hermet, woohyun

Differential Revision: https://phab.enlightenment.org/D2870

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>