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

gui/builtinShipBrowser/pfBitmapFrame.py

@@ -11,7 +11,6 @@ class PFBitmapFrame(wx.Frame):
         self.bitmap = bitmap
         self.SetSize((bitmap.GetWidth(), bitmap.GetHeight()))
         self.Bind(wx.EVT_PAINT, self.OnWindowPaint)
-        self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnWindowEraseBk)
         self.Bind(wx.EVT_TIMER, self.OnTimer)
 
         self.timer = wx.Timer(self, wx.ID_ANY)
@@ -45,9 +44,6 @@ class PFBitmapFrame(wx.Frame):
             self.direction = -1
             self.timer.Start(5)
 
-    def OnWindowEraseBk(self, event):
-        pass
-
     def OnWindowPaint(self, event):
         rect = self.GetRect()
         canvas = wx.EmptyBitmap(rect.width, rect.height)