Every event (or event class) has it's define_fields callback,
so the test is redundant.
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4BFA37BC.8080707@cn.fujitsu.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>