Retire manta from map rotation

[Maegor]

Manta's creator is gone, his name is purged and isn't credited in any way, there is no need to keep bringing him up. His views aren't reflected in the map, and that should be the end of it.

Manta just needs a minor rework, to remove all the useless Vault references. Its one of the best RP maps, and great for med low pop.