A Blizzard employee who used developer tools to allegedly help a group of friends complete a challenging Mythic+ dungeon in World of Warcraft is no longer with the company, Blizzard has confirmed. Earlier this week, a thread on Reddit called attention to a suspicious Mythic+ 23 dungeon run. A simple look at the key in question on Warcraftlogs, a site players use to track dungeon and raid performance, showed the dungeon shouldn’t have been completed in time, as after the…