tracing/user_events: Fix syntax errors in comments

Delete the redundant word 'have'.

Link: https://lkml.kernel.org/r/20220606023007.23377-1-wangxiang@cdjrlc.com



Signed-off-by: Xiang wangx <wangxiang@cdjrlc.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>