imagetransfer.py: remove unused messages
imagetransfer.py: remove unused messages

nowCommonsThis and nowCommonsThisMessage are commented out so just drop
them entirely.

Change-Id: I7c201bbe7270747ae00ac9f1b62934be00b74a76

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