misc: remove MAC pmu function declaration from misc device class

Commit 8c870933 has removed the
pmu_device_init call from misc_init, but unlike other similar commits,
has not removed its declaration.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/misc.c

@@ -62,8 +62,6 @@ static DEFINE_MUTEX(misc_mtx);
 #define DYNAMIC_MINORS 64 /* like dynamic majors */
 static unsigned char misc_minors[DYNAMIC_MINORS / 8];
 
-extern int pmu_device_init(void);
-
 #ifdef CONFIG_PROC_FS
 static void *misc_seq_start(struct seq_file *seq, loff_t *pos)
 {