Revert "tests: add test for elm_layout_text_set"
This reverts commit 0e027980f6c275f1a56ae550679010d689c91b23.
Since D7888 breaks the backward compatibility, D7888 is going to be
reverted. This patch is based on D7888 so this patch is also required to
be reverted for now.
After a proper patch is applied instead of D7888, then this patch can be