tracing: not necessary to define DEFINE_EVENT_PRINT to be empty again

After the previous cleanup, DEFINE_EVENT_PRINT's definition has no
relationship with DEFINE_EVENT. So After we re-define DEFINE_EVENT, it
is not necessary to define DEFINE_EVENT_PRINT to be empty again.

Link: http://lkml.kernel.org/r/20200612092844.56107-5-richard.weiyang@linux.alibaba.comSigned-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

include/trace/trace_events.h

@@ -709,9 +709,6 @@ static inline void ftrace_test_probe_##call(void)			\
 	check_trace_callback_type_##call(trace_event_raw_event_##template); \
 }
 
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
-
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
 
 #undef __entry