stack: I normalization: remove useless overwriting of FIFO's `_end_computation`

tomwer/synctools/stacks/reconstruction/normalization.py

@@ -78,15 +78,6 @@ class INormalizationProcessStack(FIFO, qt.QObject):
             self._computationThread.finished.connect(fct_callback)
             self._computationThread.start()
 
-    def _end_computation(self, scan, callback):
-        """
-        callback when the computation thread is finished
-
-        :param scan: pass if no call to '_computationThread is made'
-        """
-        assert isinstance(scan, TomwerScanBase)
-        FIFO._end_computation(self, scan=scan, callback=callback)
-
     def _end_threaded_computation(self, callback=None):
         assert self._scan_currently_computed is not None
         self._computationThread.finished.disconnect()