Fix past CI (#20967)

* Fix for Past CI

* make style

* clean up

* unindent 2 blocks

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

tests/models/layoutlmv2/test_tokenization_layoutlmv2.py

@@ -38,7 +38,14 @@ from transformers.models.layoutlmv2.tokenization_layoutlmv2 import (
     _is_punctuation,
     _is_whitespace,
 )
-from transformers.testing_utils import is_pt_tf_cross_test, require_pandas, require_tokenizers, require_torch, slow
+from transformers.testing_utils import (
+    is_pt_tf_cross_test,
+    require_detectron2,
+    require_pandas,
+    require_tokenizers,
+    require_torch,
+    slow,
+)
 
 from ...test_tokenization_common import (
     SMALL_TRAINING_CORPUS,
@@ -1264,6 +1271,7 @@ class LayoutLMv2TokenizationTest(TokenizerTesterMixin, unittest.TestCase):
                 self.assertEqual(sum(tokens_with_offsets["special_tokens_mask"]), added_tokens)
 
     @require_torch
+    @require_detectron2
     @slow
     def test_torch_encode_plus_sent_to_model(self):
         import torch