Remove debugging wtf

We added a wtf log to record all incidents when a creator token is
added. It was simply for debugging purpose (easier than add
FrameworkStatsLog. It has been replaced by FrameworkStatsLog.
So remove it now.

bug: 375506929
Test: manual
Flag: EXEMPT bug fix
Change-Id: I502bf3b250e25ae52c2e03954a09e83691bda11f