swallow error from failing to remove portal element when PetalBot
swallow error from failing to remove portal element when PetalBot

fixes a bunch of samey errors from PetalBot crawling. don't know if we
should just robots.txt that off but this is easier :)

sMteX/WoWAnalyzer,sMteX/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,sMteX/WoWAnalyzer