tracing/sched: Remove obsolete comment on suffixes

tracing/sched: Remove obsolete comment on suffixes

Commit ac01fa73f530 ("tracepoint: Have tracepoints created with DECLARE_
TRACE() have _tp suffix") makes it unnecessary to manually add a suffix.

Remove a now obsolete comment.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ricardo Neri <ricardo.neri@intel.com>
Link: https://lore.kernel.org/20250620-rneri-tp-comment-fix-v1-1-e0f6495ac33c@linux.intel.com
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>