[EFL] Delete file.edc and file_*.png.
https://bugs.webkit.org/show_bug.cgi?id=125134

Patch by Kim Byung Jun <bj1987.kim@samsung.com> on 2013-12-25
Reviewed by Gyuyoung Kim.

File_theme uses button form.

* platform/efl/DefaultTheme/CMakeLists.txt:
* platform/efl/DefaultTheme/default.edc:
* platform/efl/DefaultTheme/widget/file/file.edc: Removed.
* platform/efl/DefaultTheme/widget/file/file_focus.png: Removed.
* platform/efl/DefaultTheme/widget/file/file_hover.png: Removed.
* platform/efl/DefaultTheme/widget/file/file_normal.png: Removed.
* platform/efl/DefaultTheme/widget/file/file_press.png: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161083 268f45cc-cd09-0410-ab3c-d52691b4dbfc