[WK2][EFL] Remove declaration of non-existent functions from EwkView
https://bugs.webkit.org/show_bug.cgi?id=110572

Reviewed by Kenneth Rohde Christiansen.

Removed declarations of non-existent EwkView::paintToCurrentGLContext() and
EwkView::paintToCairoSurface(cairo_surface_t*) that were accidentally
left at r143699.

* UIProcess/API/efl/EwkView.h:
(EwkView):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143713 268f45cc-cd09-0410-ab3c-d52691b4dbfc