evas/gl: Do not reassign the surface during make current.

There was already a surface created by _evgl_tls_resource_create(). If
we assign a new one here, the wrong one will be destroyed at
_evgl_tls_resource_destroy(), and later the GL window will be destroyed
before the surface, causing invalid access errors.

This fixes https://phab.enlightenment.org/T326

src/modules/evas/engines/gl_common/evas_gl_core.c

@@ -123,10 +123,6 @@ _internal_resource_make_current(void *eng_data, EVGL_Context *ctx)
    else
       context = (void*)rsc->context;
 
-   // Update in case they've changed
-   if (rsc->id == evgl_engine->main_tid)
-      rsc->surface = evgl_engine->funcs->evas_surface_get(eng_data);
-
    surface = (void*)rsc->surface;
 
    // Do the make current