Remove FIXME from APISite.loadflowinfo
Remove FIXME from APISite.loadflowinfo

As APISite.loadflowinfo is deprecated, and this FIXME would require
changing the exception raised from APIError to UnknownException,
it is better to leave it and document the existing behaviour.

Change-Id: I3df9f67edc252069192efcdfda0a12262189ef0c

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