When it appears in any pending civil action that the principal issues have been adjudicated or have become moot, or that the parties have shown no interest in further prosecution, the judicial officer may give notice to all counsel and unrepresented parties that the action will be dismissed 30 days after the date of the notice unless good cause for its retention on the docket is shown. In the absence of good cause shown within that period of time, the judicial officer may dismiss the action. The clerk shall transmit a copy of any order of dismissal to all counsel and unrepresented parties. This rule does not modify or affect provisions for dismissal of actions under FR Civ P 41 or any other authority.