remove nonfunctional assert

qtgui/scoreview.py

@@ -214,7 +214,6 @@ class ScoreView(QtWidgets.QGraphicsView):
             self.mainWindow.menuActionDatabase.loadToolbarContext("notation")
 
         elif self.mainWindow.ui.actionBlock_Mode.isChecked():
-            assert calledByMenu, "We currently assume that only the program start calls this function not via the menu, and that chooses notation mode"
             self.mainWindow.menuActionDatabase.noteEditMode()
             self.mainWindow.menuActionDatabase.writeProtection(True)
             self.scoreScene.updateMode("block")