[cleanup] Remove unclear DeprecatinWarning for ignore_warnings parameter
[cleanup] Remove unclear DeprecatinWarning for ignore_warnings parameter

"report_success" and "ignore_warnings parameter usage is unclear and
not well documented. Remove this DeprecationWarning until T271899 is solved.

Bug: T271899
Change-Id: Ib58b5706278e4256e2996d9311a56010dd316bf3

wikimedia/pywikibot-core,wikimedia/pywikibot-core