Today I accidently deleted my Sunfire Handwraps(crafted by one of my guildies) and I asked a GM to retrieve my gloves. When I got em back, the name of the crafter( Made by X ) was removed.
So, basically if you want to remove the crafter's name from an item, just delete it and send a ticket to GM to retrieve it. Useless thing, but I enjoyied it.