Summary:
we don't need the image preload api call in efl_file_unload,
this make the unexpected SIG_LOAD_ERROR emit, when elm_image_memfile_set() is called.
@fix
Reviewers: Hermet, jsuya, kimcinoo
Reviewed By: Hermet
Subscribers: cedric, #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D12056