remove vice versa FA/GA for the same language code; code improvements using instance vars; removing old/unused code stuff
remove vice versa FA/GA for the same language code;
code improvements using instance vars;
removing old/unused code stuff

https://mediawiki.org/wiki/Special:Code/pywikipedia/11750

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