Redo: Rm change_category func from category_redirect.py
Redo: Rm change_category func from category_redirect.py

Bug which was caused by this change is solved now.

Change-Id: Ib368eb96a4d8e5459423f4739ba3a4dc7c63f790

VcamX/pywikibot-core,wikimedia/pywikibot-core,hasteur/g13bot_tools_new,icyflame/batman,jayvdb/pywikibot-core,valhallasw/pywikibot-core,xZise/pywikibot-core,happy5214/pywikibot-core,npdoty/pywikibot,magul/pywikibot-core,happy5214/pywikibot-core,Darkdadaah/pywikibot-core,npdoty/pywikibot,darthbhyrava/pywikibot-local,trishnaguha/pywikibot-core,hasteur/g13bot_tools_new,magul/pywikibot-core,PersianWikipedia/pywikibot-core,jayvdb/pywikibot-core,emijrp/pywikibot-core,wikimedia/pywikibot-core,Darkdadaah/pywikibot-core,h4ck3rm1k3/pywikibot-core,hasteur/g13bot_tools_new,h4ck3rm1k3/pywikibot-core,TridevGuha/pywikibot-core,smalyshev/pywikibot-core