Fix lint error (Trailing whitespace) (#7059)

* .

* .

official/resnet/ctl/ctl_imagenet_main.py

@@ -111,7 +111,7 @@ def get_input_dataset(flags_obj, strategy):
 
   if strategy:
     train_ds = strategy.experimental_distribute_dataset(train_ds)
-  
+
   test_ds = None
   if not flags_obj.skip_eval:
     test_ds = input_fn(

official/resnet/ctl/ctl_imagenet_test.py

@@ -62,7 +62,7 @@ class CtlImagenetTest(googletest.TestCase):
 
   def test_end_to_end_no_dist_strat(self):
     """Test Keras model with 1 GPU, no distribution strategy."""
-    
+
     extra_flags = [
         "-distribution_strategy", "off",
         "-model_dir", "ctl_imagenet_no_dist_strat",