[PSA] Removed configuration options: configLocation and getroomnode

In order to prepare our config to be more future-proof and secure, we plan on switching away from a JS file to a form of plaintext file. This means no code objects could five there, so getromnode had to be removed.

In addition, configLocation (also getromnode, for that matter) was never implemented on mobile and it was a small maintenance burden.

If you are using either of these, the next update will break your setup, so leave a comment so we can help you transition.