wayland_shm: Move surface free into surface_destroy

The caller shouldn't have to free this.

src/modules/evas/engines/wayland_shm/evas_dmabuf.c

@@ -142,6 +142,8 @@ _evas_dmabuf_surface_destroy(Surface *s)
 
    EINA_LIST_FREE(s->buffers, b)
      ecore_wl2_buffer_destroy(b);
+
+   free(s);
 }
 
 Surface *

src/modules/evas/engines/wayland_shm/evas_outbuf.c

@@ -71,7 +71,6 @@ _evas_outbuf_free(Outbuf *ob)
    _evas_outbuf_idle_flush(ob);
 
    if (ob->surface) ob->surface->funcs.destroy(ob->surface);
-   free(ob->surface);
 
    eina_array_flush(&ob->priv.onebuf_regions);