cogl: Remove legacy OpenGL driver support
This means the two Cogl drivers left are OpenGL >= 3.1 and GLES >= 2.0.
Putting this out here.. are there really any drivers that only support legacy OpenGL but not GLES 2.0?
This means the two Cogl drivers left are OpenGL >= 3.1 and GLES >= 2.0.
Putting this out here.. are there really any drivers that only support legacy OpenGL but not GLES 2.0?