backend/drm: stop initializing backend renderer

backend/drm/backend.c

@@ -232,10 +232,6 @@ struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
 	}
 
 	if (drm->parent) {
-		// Ensure we use the same renderer as the parent backend
-		drm->backend.renderer = wlr_backend_get_renderer(&drm->parent->backend);
-		assert(drm->backend.renderer != NULL);
-
 		if (!init_drm_renderer(drm, &drm->mgpu_renderer)) {
 			wlr_log(WLR_ERROR, "Failed to initialize renderer");
 			goto error_resources;