removed not needed parameter

openlp.pyw

@@ -179,7 +179,7 @@ class OpenLP(QtGui.QApplication):
         # make sure Qt really display the splash screen
         self.processEvents()
         # Decide how many screens we have and their size
-        screens = ScreenList(self, self.desktop())
+        screens = ScreenList(self.desktop())
         # start the main app window
         self.appClipboard = self.clipboard()
         self.mainWindow = MainWindow(screens, app_version, self.appClipboard)

openlp/core/ui/screen.py

@@ -42,13 +42,14 @@ class ScreenList(object):
     """
     log.info(u'Screen loaded')
 
-    def __init__(self, parent, desktop):
+    def __init__(self, desktop):
         """
+        Initialise the screen list.
+
+        ``desktop``
+            A ``QDesktopWidget`` object.
         """
-        self.parent = parent
         self.desktop = desktop
-        # The screen used for the rendermanager.
-        # (Why does the rendermanager needs his own?)
         self.preview = None
         self.current = None
         self.override = None