tracing: Remove unused function trace_current_buffer_discard_commit()

The function trace_current_buffer_discard_commit() has no callers, remove
it.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

include/linux/trace_events.h

@@ -158,8 +158,6 @@ struct ring_buffer_event *
 trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
 				  int type, unsigned long len,
 				  unsigned long flags, int pc);
-void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
-					 struct ring_buffer_event *event);
 
 void tracing_record_cmdline(struct task_struct *tsk);
 

kernel/trace/trace.c

@@ -1734,7 +1734,6 @@ trace_current_buffer_lock_reserve(struct ring_buffer **current_rb,
 	return trace_buffer_lock_reserve(*current_rb,
 					 type, len, flags, pc);
 }
-EXPORT_SYMBOL_GPL(trace_current_buffer_lock_reserve);
 
 void trace_buffer_unlock_commit_regs(struct trace_array *tr,
 				     struct ring_buffer *buffer,
@@ -1748,13 +1747,6 @@ void trace_buffer_unlock_commit_regs(struct trace_array *tr,
 	ftrace_trace_userstack(buffer, flags, pc);
 }
 
-void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
-					 struct ring_buffer_event *event)
-{
-	ring_buffer_discard_commit(buffer, event);
-}
-EXPORT_SYMBOL_GPL(trace_current_buffer_discard_commit);
-
 void
 trace_function(struct trace_array *tr,
 	       unsigned long ip, unsigned long parent_ip, unsigned long flags,