[tests] remove deprecated tests for model loading (#29450)

* gix

* fix style

* remove equivalent tests

* add back for image_processor

* remove again

tests/test_configuration_utils.py

@@ -248,12 +248,6 @@ class ConfigTestUtils(unittest.TestCase):
             # This check we did call the fake head request
             mock_head.assert_called()
 
-    def test_legacy_load_from_url(self):
-        # This test is for deprecated behavior and can be removed in v5
-        _ = BertConfig.from_pretrained(
-            "https://huggingface.co/hf-internal-testing/tiny-random-bert/resolve/main/config.json"
-        )
-
     def test_local_versioning(self):
         configuration = AutoConfig.from_pretrained("google-bert/bert-base-cased")
         configuration.configuration_files = ["config.4.0.0.json"]