Some items look better without any enchant, so how to remove an enchant that has already been applied on a weapon, item?
Here is a simple solution: There is nothing in the game at this point that can remove enchants, not even that player that have the enchanting profession.
The only way is to submit a gamemaster ticket explaining the issue, the gamemaster will send the item unenchanted in the mailbox and the enchanted one will vanish from the inventory.
On some weapons like Thunderfury for example, an enchant will eclipse the look of the weapon, it is better to leave it unenchanted.
On normal gear like chest it doesn’t matter since the enchants don’t change the looks.
