[cleanup] Remove interwiki_replacement_overrides
[cleanup] Remove interwiki_replacement_overrides

Override is done by code_alias already
and there is no difference to other redirected sites

Bug: T225417
Bug: T89451
Change-Id: I93cee7ae6fd3f46c4dc10b8ee598c2bf4df550aa

PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core