remove old panda support

direct/src/showbase/ShowBase.py

@@ -241,10 +241,7 @@ class ShowBase(DirectObject.DirectObject):
             self.openDefaultWindow(startDirect = False, props=props)
 
         self.loader = Loader.Loader(self)
-
-        # Temporary hasattr for old Pandas.
-        if hasattr(self.graphicsEngine, 'setDefaultLoader'):
-            self.graphicsEngine.setDefaultLoader(self.loader.loader)
+        self.graphicsEngine.setDefaultLoader(self.loader.loader)
             
         self.eventMgr = eventMgr
         self.messenger = messenger