Unreviewed EFL gardening.

Remove EFL-specific test expectations that were identical to generic expectations
and rebaseline test cases.

* platform/efl-wk2/compositing/overflow/content-gains-scrollbars-expected.txt: Removed.
* platform/efl-wk2/compositing/overflow/content-loses-scrollbars-expected.txt: Removed.
* platform/efl/compositing/backing/no-backing-for-clip-overhang-expected.txt: Removed.
* platform/efl/compositing/contents-opaque/hidden-with-visible-child-expected.txt: Removed.
* platform/efl/compositing/contents-opaque/overflow-hidden-child-layers-expected.txt: Removed.
* platform/efl/svg/W3C-SVG-1.1-SE/paths-dom-02-f-expected.txt: Rebaselined after r154896.
* platform/efl/svg/batik/paints/gradientLimit-expected.txt: Updating baselines after enabling the subpixel layout.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@157664 268f45cc-cd09-0410-ab3c-d52691b4dbfc