Remove old stat tracker code

The stat tracker is down for the foreseeable future. I would rather ship a new version without the old code referencing it and push an update later to get it back online than to keep these old methods laying around.

More specifically, I think I could do a better job of fingerprinting a server on the stat tracker end than on the client end.

This also removes the demand for creating files in the Roaming folder, which is also good.