bestate: Remove redundant test for the start block.

The start block has no predecessors, so the following loop will not be executed.

ir/be/bestate.c

@@ -434,15 +434,10 @@ static void belady_walker(ir_node *block, void *data)
 static void fix_block_borders(ir_node *block, void *data)
 {
 	minibelady_env_t *env = (minibelady_env_t*)data;
-	ir_graph *irg = get_irn_irg(block);
-	ir_node *startblock = get_irg_start_block(irg);
 	int i;
 	int arity;
 	block_info_t *block_info;
 
-	if (block == startblock)
-		return;
-
 	DBG((dbg, LEVEL_3, "\n"));
 
 	block_info = get_block_info(block);