Remove old code for PyTorch, Accelerator and tokenizers (#37234)

* Remove unneeded library version checks

Signed-off-by: cyy <cyyever@outlook.com>

* Remove PyTorch condition

Signed-off-by: cyy <cyyever@outlook.com>

* Remove PyTorch condition

Signed-off-by: cyy <cyyever@outlook.com>

* Fix ROCm get_device_capability

Signed-off-by: cyy <cyyever@outlook.com>

* Revert "Fix ROCm get_device_capability"

This reverts commit 0e756434bd7e74ffd73de5500476072b096570a6.

* Remove unnecessary check

Signed-off-by: cyy <cyyever@outlook.com>

* Revert changes

Signed-off-by: cyy <cyyever@outlook.com>

---------

Signed-off-by: cyy <cyyever@outlook.com>

tests/utils/test_modeling_utils.py

@@ -81,7 +81,6 @@ from transformers.utils.import_utils import (
     is_tf_available,
     is_torch_npu_available,
     is_torch_sdpa_available,
-    is_torchdynamo_available,
 )
 
 
@@ -1483,8 +1482,6 @@ class ModelUtilsTest(TestCasePlus):
                     model.warn_if_padding_and_no_attention_mask(input_ids, attention_mask=None)
             self.assertIn("You may ignore this warning if your `pad_token_id`", cl.out)
 
-        if not is_torchdynamo_available():
-            self.skipTest(reason="torchdynamo is not available")
         with self.subTest("Ensure that the warning code is skipped when compiling with torchdynamo."):
             logger.warning_once.cache_clear()
             from torch._dynamo import config, testing