storage_service: get rid of handle_state_moving declaration

The implementation was already removed in e64613154f

Signed-off-by: Benny Halevy <bhalevy@scylladb.com>

Closes scylladb/scylladb#16742

service/storage_service.hh

@@ -505,14 +505,6 @@ private:
      */
     future<> handle_state_left(inet_address endpoint, std::vector<sstring> pieces, gms::permit_id);
 
-    /**
-     * Handle node moving inside the ring.
-     *
-     * @param endpoint moving endpoint address
-     * @param pieces STATE_MOVING, token
-     */
-    void handle_state_moving(inet_address endpoint, std::vector<sstring> pieces, gms::permit_id);
-
     /**
      * Handle notification that a node being actively removed from the ring via 'removenode'
      *