Drop unneeded dependency

glut is not needed since 2015: https://github.com/hedgewars/hw/commit/0a863d72be09c1981526bcf8c091b06f99309cf4

Also remove ghc-libs for this 1 namcap warning, is pulled with all this haskell stuff anyway:

hedgewars W: Dependency included, but may not be needed ('ghc-libs')