m68k/irq: Remove obsolete support for user vector interrupt fixups

It was used on Apollo only, before its conversion to genirq.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/sun3/sun3ints.c

@@ -109,7 +109,7 @@ void __init sun3_init_IRQ(void)
 
 	m68k_setup_irq_controller(&sun3_irq_chip, handle_level_irq, IRQ_AUTO_1,
 				  7);
-	m68k_setup_user_interrupt(VEC_USER, 128, NULL);
+	m68k_setup_user_interrupt(VEC_USER, 128);
 
 	if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL))
 		pr_err("Couldn't register %s interrupt\n", "int5");