um: kill unused cpu()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/include/shared/kern_util.h

@@ -53,7 +53,6 @@ extern void do_uml_exitcalls(void);
 extern int __cant_sleep(void);
 extern int get_current_pid(void);
 extern int copy_from_user_proc(void *to, void *from, int size);
-extern int cpu(void);
 extern char *uml_strdup(const char *string);
 
 extern unsigned long to_irq_stack(unsigned long *mask_out);

arch/um/kernel/process.c

@@ -264,11 +264,6 @@ int clear_user_proc(void __user *buf, int size)
 	return clear_user(buf, size);
 }
 
-int cpu(void)
-{
-	return current_thread_info()->cpu;
-}
-
 static atomic_t using_sysemu = ATOMIC_INIT(0);
 int sysemu_supported;