[EFL] Drop support for the EFL 1.7
https://bugs.webkit.org/show_bug.cgi?id=139114

Reviewed by Gyuyoung Kim.

.:

* Source/cmake/EFLHelpers.cmake: Removed.
* Source/cmake/FindEcore.cmake: Removed.
* Source/cmake/FindEdje.cmake: Removed.
* Source/cmake/FindEet.cmake: Removed.
* Source/cmake/FindEeze.cmake: Removed.
* Source/cmake/FindEfreet.cmake: Removed.
* Source/cmake/FindEina.cmake: Removed.
* Source/cmake/FindElementary.cmake: Removed.
* Source/cmake/FindEvas.cmake: Removed.
* Source/cmake/OptionsEfl.cmake:

Source/WTF:

* wtf/efl/EflTypedefs.h: Removed old definitions which EFL 1.7 used.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@176589 268f45cc-cd09-0410-ab3c-d52691b4dbfc