Revert "Tests"

This reverts commit b35e7b68ca.

tests/test_trainer.py

@@ -59,8 +59,6 @@ if is_torch_available():
     )
     from transformers.modeling_utils import unwrap_model
 
-    from .test_trainer_utils import TstLayer
-
 
 PATH_SAMPLE_TEXT = f"{get_tests_dir()}/fixtures/sample_text.txt"
 
@@ -992,18 +990,6 @@ class TrainerIntegrationTest(unittest.TestCase):
         # should be about half of fp16_init
         # perfect world: fp32_init/2 == fp16_eval
         self.assertAlmostEqual(fp16_eval, fp32_init / 2, delta=5_000)
-    
-    def test_no_wd_param_group(self):
-        model = torch.nn.Sequential(TstLayer(128), torch.nn.ModuleList([TstLayer(128), TstLayer(128)]))
-        trainer = Trainer(model=model)
-        trainer.create_optimizer_and_scheduler(10)
-        # fmt: off
-        wd_names = ['0.linear1.weight', '0.linear2.weight', '1.0.linear1.weight', '1.0.linear2.weight', '1.1.linear1.weight', '1.1.linear2.weight']
-        # fmt: on
-        wd_params = [p for n, p in model.named_parameters() if n in wd_names]
-        no_wd_params = [p for n, p in model.named_parameters() if n not in wd_names]
-        self.assertListEqual(trainer.optimizer.param_groups[0]["params"], wd_params)
-        self.assertListEqual(trainer.optimizer.param_groups[1]["params"], no_wd_params)
 
 
 @require_torch