elementary,evas: remove obsolete legacy includes

elementary,evas: remove obsolete legacy includes

Summary:
Since the removal of legacy interfaces from eo files, these files
contain nothing useful, and can safely be removed. One exception
is `efl_ui_layout.eo.legacy.h`, which will require more involved
work to remove, since a lot of things seem to depend on the
Efl_Ui_Layout typedef being present, wrongly (i suspect this
will break everything with `EFL_NOLEGACY_API_SUPPORT`).

Reviewers: cedric, zmike, bu5hm4n

Reviewed By: zmike

Subscribers: #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D8251

Change-Id: I07511538b865391ef9e0fe6780ef175253e77da2