Remove `fitnesse.runner` package

Fitnesse.runner contains a main class FormattingOption. I sincerely wonder if it is used anywhere.

It requires a result file and passes that to a running FitNesse instance in order to format it (I think).

If nobody objects, I'll clean up this code.

It's using the `fitnesse.responders.run.TestResultFormattingResponder` class to actually retrieve the formatted output.

If any formatting is required it should be as simple as a `curl` command.