rts: Ensure that nonmoving gc isn't used with profiling
I realized that we didn't actually explicitly prohibit this configuration.
Due to a large amount of spam we do not allow new users to create repositories, they are "external" users. If you are a new user and want to create a repository, for example for forking GHC, open a new issue on ghc/ghc using the "get-verified" issue template
I realized that we didn't actually explicitly prohibit this configuration.