def unpause():
    """
        Remove this L{IPause} from the set of L{IPause}s obstructing delivery
        from an L{IFount}.  When no L{IPause}s remain, the flow will resume.

        The spice must flow.

        @raise AlreadyUnpaused: An L{IPause} may only be C{unpause}d once; it
            can not be re-paused.  Therefore a second invocation of this
            method is invalid and will raise an L{AlreadyUnpaused} exception.
        """
