pwm: Drop pwm_apply_state()

This function is not supposed to be used any more since commit
c748a6d7 ("pwm: Rename pwm_apply_state() to
pwm_apply_might_sleep()") that is included in v6.8-rc1. Two kernel
releases should be enough for everyone to adapt, so drop the old
function that was introduced as a compatibility stub for the transition.
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>

include/linux/pwm.h

@@ -563,13 +563,6 @@ static inline void pwm_apply_args(struct pwm_device *pwm)
 	pwm_apply_might_sleep(pwm, &state);
 }
 
-/* only for backwards-compatibility, new code should not use this */
-static inline int pwm_apply_state(struct pwm_device *pwm,
-				  const struct pwm_state *state)
-{
-	return pwm_apply_might_sleep(pwm, state);
-}
-
 struct pwm_lookup {
 	struct list_head list;
 	const char *provider;