EMSUSD-1912 disable new light test on USD 24.11

For some reasons, USD 24.11 reports the root layer as being modified even though dumping the layer as string shows the data is not modified. Will need to be investigated further.

test/lib/ufe/testLight.py

@@ -19,19 +19,16 @@
 import fixturesUtils
 import mayaUtils
 import testUtils
-import ufeUtils
 import usdUtils
 
-from pxr import Gf, Sdf
+from pxr import Usd, Sdf
 
 from maya import cmds
 from maya import standalone
-from maya.api import OpenMaya as om
 
 import ufe
 import os
 
-from functools import partial
 import unittest
 
 class LightTestCase(unittest.TestCase):
@@ -321,6 +318,7 @@ def testUsdVolumeLights(self):
         usdDomeLight = usdUtils.getPrimFromSceneItem(domelightItem)
         self._TestDomeLight(ufeDomeLight, usdDomeLight)
 
+    @unittest.skipUnless(Usd.GetVersion() < (0, 24, 11), 'USD 24.11 reports the root layer dirty even though data is unmodified.')
     def testLoadingLight(self):
         '''
         Verify that the act of loading a stage with lights does not dirty the stage.
@@ -331,6 +329,7 @@ def testLoadingLight(self):
         # Verify the stage is not dirty
         def verifyClean():
             layer: Sdf.Layer = stage.GetRootLayer()
+            print(layer.ExportToString())
             self.assertFalse(layer.dirty)
 
         verifyClean()