Remove the SMP renderer feature

code/renderer/tr_bsp.c

@@ -147,7 +147,7 @@ static	void R_LoadLightmaps( lump_t *l ) {
 	buf = fileBase + l->fileofs;
 
 	// we are about to upload textures
-	R_SyncRenderThread();
+	R_IssuePendingRenderCommands();
 
 	// create all the lightmaps
 	tr.numLightmaps = len / (LIGHTMAP_SIZE * LIGHTMAP_SIZE * 3);