include/linux/kdev_t.h: remove new_valid_dev()

As all new_valid_dev() checks have been removed it's time to drop
new_valid_dev() itself.

No functional change.

Signed-off-by: Yaowei Bai <[e-mail]>
Cc: Al Viro <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/kdev_t.h

···
 	return MKDEV((val >> 8) & 255, val & 255);
 }
 
-static inline bool new_valid_dev(dev_t dev)
-{
-	return 1;
-}
-
 static inline u32 new_encode_dev(dev_t dev)
 {
 	unsigned major = MAJOR(dev);