net: remove linkmode_change_bit()

No callers since v5.7, the initial use case seems pretty
esoteric so removing this should not harm the completeness
of the API.

Signed-off-by: Jakub Kicinski <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/linux/linkmode.h

···
 		linkmode_clear_bit(nr, addr);
 }
 
-static inline void linkmode_change_bit(int nr, volatile unsigned long *addr)
-{
-	__change_bit(nr, addr);
-}
-
 static inline int linkmode_test_bit(int nr, const volatile unsigned long *addr)
 {
 	return test_bit(nr, addr);