Revert "ANDROID: sched: Add replace_next_task_fair vendor hook in pick_next_task_fair"

This reverts commit 3d5bad71a7.

Upstream has removed pick_next_task_fair() in commit 5ad278dd20
("sched: Remove sched_class::pick_next_task()"), so we can't have this
hook there anymore. Plus, it doesn't seem to be critical functionality
to be in android-mainline.

Bug: 413566818
Cc: John Stultz <jstultz@google.com>
Change-Id: Ifc26a14474668f8462e1c9c94fdb969a2b76aab3
Signed-off-by: Carlos Llamas <cmllamas@google.com>

include/trace/hooks/sched.h

@@ -77,10 +77,6 @@ DECLARE_RESTRICTED_HOOK(android_rvh_setscheduler,
 	TP_PROTO(struct task_struct *p),
 	TP_ARGS(p), 1);
 
-DECLARE_RESTRICTED_HOOK(android_rvh_replace_next_task_fair,
-	TP_PROTO(struct rq *rq, struct task_struct **p, struct task_struct *prev),
-	TP_ARGS(rq, p, prev), 1);
-
 struct sched_group;
 DECLARE_RESTRICTED_HOOK(android_rvh_sched_balance_find_src_group,
 	TP_PROTO(struct sched_group *busiest, struct rq *dst_rq, int *out_balance),

kernel/sched/fair.c

@@ -9316,8 +9316,6 @@ pick_next_task_fair(struct rq *rq, struct task_struct *prev, struct rq_flags *rf
 
 again:
 	p = pick_task_fair(rq, rf);
-	trace_android_rvh_replace_next_task_fair(rq, &p, prev);
-
 	if (!p)
 		goto idle;
 	se = &p->se;

kernel/sched/vendor_hooks.c

@@ -41,7 +41,6 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_migrate_queued_task);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_new_task_stats);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_place_entity);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_prepare_prio_fork);
-EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_replace_next_task_fair);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_rtmutex_prepare_setprio);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_rto_next_cpu);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_sched_balance_find_src_group);