showbase: remove wantUberdog from builtin scope

Applications that need it can trivially copy it to their own modules.

Closes #895

direct/src/showbase/ShowBase.py

@@ -422,7 +422,6 @@ class ShowBase(DirectObject.DirectObject):
         builtins.cpMgr = ConfigPageManager.getGlobalPtr()
         builtins.cvMgr = ConfigVariableManager.getGlobalPtr()
         builtins.pandaSystem = PandaSystem.getGlobalPtr()
-        builtins.wantUberdog = self.config.GetBool('want-uberdog', 1)
         if __debug__:
             builtins.deltaProfiler = DeltaProfiler.DeltaProfiler("ShowBase")
             self.onScreenDebug = OnScreenDebug.OnScreenDebug()