kernel: sched: removing dead code

Due to the recent changes to scheduler z_find_first_thread_to_unpend
& z_remove_thread_from_ready_q are not used anymore. So removing the
dead code.

fixes: #32691

Signed-off-by: Spoorthy Priya Yerabolu <[email protected]>

Author: yerabolu

kernel/include/ksched.h

@@ -38,7 +38,6 @@ BUILD_ASSERT(K_LOWEST_APPLICATION_THREAD_PRIO
 
 void z_sched_init(void);
 void z_move_thread_to_end_of_prio_q(struct k_thread *thread);
-void z_remove_thread_from_ready_q(struct k_thread *thread);
 int z_is_thread_time_slicing(struct k_thread *thread);
 void z_unpend_thread_no_timeout(struct k_thread *thread);
 struct k_thread *z_unpend1_no_timeout(_wait_q_t *wait_q);
@@ -55,8 +54,6 @@ int z_unpend_all(_wait_q_t *wait_q);
 void z_thread_priority_set(struct k_thread *thread, int prio);
 bool z_set_prio(struct k_thread *thread, int prio);
 void *z_get_next_switch_handle(void *interrupted);
-struct k_thread *z_find_first_thread_to_unpend(_wait_q_t *wait_q,
-					      struct k_thread *from);
 void idle(void *a, void *b, void *c);
 void z_time_slice(int ticks);
 void z_reset_time_slice(void);

kernel/sched.c

@@ -595,13 +595,6 @@ static void unready_thread(struct k_thread *thread)
 	update_cache(thread == _current);
 }
 
-void z_remove_thread_from_ready_q(struct k_thread *thread)
-{
-	LOCKED(&sched_spinlock) {
-		unready_thread(thread);
-	}
-}
-
 /* sched_spinlock must be held */
 static void add_to_waitq_locked(struct k_thread *thread, _wait_q_t *wait_q)
 {
@@ -643,20 +636,6 @@ void z_pend_thread(struct k_thread *thread, _wait_q_t *wait_q,
 	pend(thread, wait_q, timeout);
 }
 
-ALWAYS_INLINE struct k_thread *z_find_first_thread_to_unpend(_wait_q_t *wait_q,
-						     struct k_thread *from)
-{
-	ARG_UNUSED(from);
-
-	struct k_thread *ret = NULL;
-
-	LOCKED(&sched_spinlock) {
-		ret = _priq_wait_best(&wait_q->waitq);
-	}
-
-	return ret;
-}
-
 static inline void unpend_thread_no_timeout(struct k_thread *thread)
 {
 	_priq_wait_remove(&pended_on(thread)->waitq, thread);