elm_box: remove all legacy usage from eo files

elm_box: remove all legacy usage from eo files

this takes the current generated output from eolian for legacy code in
efl and adds it to the tree, then removes legacy references from the
corresponding eo files. in the case where the entire eo file was for
a legacy object, that eo file has been removed from the tree

ref T7724

Reviewed-by: Daniel Kolesa <daniel@octaforge.org>
Reviewed-by: Cedric BAIL <cedric.bail@free.fr>
Differential Revision: https://phab.enlightenment.org/D8154

Change-Id: I5df82b0faac2cc0b0689b39dc23fc8d273c8908f