sched: delete unused & buggy function definitions

None of these functions does what its name implies when
CONFIG_SCHED_WALT=n. While all are currently unused, future patches
could introduce subtle bugs by calling any of them from non WALT
specific code. Delete the functions so it's obvious if new callers are
added.

Test: build kernel
Change-Id: Ib7552afb5668b48fe2ae56307016e98716e00e63
Signed-off-by: Connor O'Brien <connoro@google.com>
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>

kernel/sched/sched.h

@@ -3053,7 +3053,6 @@ task_in_cum_window_demand(struct rq *rq, struct task_struct *p)
 }
 
 static inline bool hmp_capable(void) { return false; }
-static inline bool is_max_capacity_cpu(int cpu) { return true; }
 static inline bool is_min_capacity_cpu(int cpu)
 {
 #ifdef CONFIG_SMP
@@ -3066,22 +3065,6 @@ static inline bool is_min_capacity_cpu(int cpu)
 #endif
 }
 
-static inline int
-preferred_cluster(struct sched_cluster *cluster, struct task_struct *p)
-{
-	return 1;
-}
-
-static inline struct sched_cluster *rq_cluster(struct rq *rq)
-{
-	return NULL;
-}
-
-static inline u64 scale_load_to_cpu(u64 load, int cpu)
-{
-	return load;
-}
-
 #ifdef CONFIG_SMP
 static inline int cpu_capacity(int cpu)
 {
@@ -3113,11 +3096,6 @@ static inline int update_preferred_cluster(struct related_thread_group *grp,
 
 static inline void add_new_task_to_grp(struct task_struct *new) {}
 
-static inline int same_freq_domain(int src_cpu, int dst_cpu)
-{
-	return 1;
-}
-
 static inline void clear_reserved(int cpu) { }
 static inline int alloc_related_thread_groups(void) { return 0; }
 
@@ -3159,13 +3137,6 @@ static inline bool early_detection_notify(struct rq *rq, u64 wallclock)
 	return 0;
 }
 
-#ifdef CONFIG_SMP
-static inline unsigned int power_cost(int cpu, u64 demand)
-{
-	return SCHED_CAPACITY_SCALE;
-}
-#endif
-
 static inline void note_task_waking(struct task_struct *p, u64 wallclock) { }
 static inline void walt_map_freq_to_load(void) { }
 static inline void walt_update_min_max_capacity(void) { }