[PATCH] useless linux/irq.h includes (arch/um)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/kernel/irq.c

@@ -9,7 +9,6 @@
 #include "linux/kernel.h"
 #include "linux/module.h"
 #include "linux/smp.h"
-#include "linux/irq.h"
 #include "linux/kernel_stat.h"
 #include "linux/interrupt.h"
 #include "linux/random.h"