sched/tracing: Remove the redundant 'success' in the sched tracepoint

'success' is left here for a long time and also it is meaningless
for the upper user. Just remove it.

[ There were some tools expecting this, and this may break them. But
hopefully they've been fixed in the mean time. Otherwise this may be
likely reverted - SDR ]

Link: https://lkml.kernel.org/r/[e-mail]

Cc: Peter Zijlstra <[e-mail]>
Signed-off-by: Ed Tsai <[e-mail]>
Signed-off-by: Steven Rostedt (VMware) <[e-mail]>

include/trace/events/sched.h

···
 		__array(	char,	comm,	TASK_COMM_LEN	)
 		__field(	pid_t,	pid			)
 		__field(	int,	prio			)
-		__field(	int,	success			)
 		__field(	int,	target_cpu		)
 	),
 
···
 		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
 		__entry->pid		= p->pid;
 		__entry->prio		= p->prio; /* XXX SCHED_DEADLINE */
-		__entry->success	= 1; /* rudiment, kill when possible */
 		__entry->target_cpu	= task_cpu(p);
 	),