Delete everything that shown up on status.

def purge(self, ignore_ignores):
        """Delete everything that shown up on status."""
        command = ['sync', '#none']
        if ignore_ignores:
            command.append('--no-ignore')
        d = self._dovccmd(command, collectStdout=True)

        # add deferred to rm tree

        # then add defer to sync to revision
        return d