Remove EVT_ERASE_BACKGROUND events - pretty sure these were there for older versions of wx where the background wasn't erased properly

gui/builtinPreferenceViews/pyfaGaugePreferences.py

@@ -48,10 +48,6 @@ class PFGaugePreview(wx.Window):
         self.Bind(wx.EVT_ENTER_WINDOW, self.OnWindowEnter)
         self.Bind(wx.EVT_LEAVE_WINDOW, self.OnWindowLeave)
         self.Bind(wx.EVT_TIMER, self.OnTimer)
-        self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBk)
-
-    def OnEraseBk(self, event):
-        pass
 
     def OnTimer(self, event):
         if event.GetId() == self.timerID: