[tests] remove tests from libraries with deprecated support (flax, tensorflow_text, ...) (#39051)

* rm tf/flax tests

* more flax deletions

* revert fixture change

* reverted test that should not be deleted; rm tf/flax test

* revert

* fix a few add-model-like tests

* fix add-model-like checkpoint source

* a few more

* test_get_model_files_only_pt fix

* fix test_retrieve_info_for_model_with_xxx

* fix test_retrieve_model_classes

* relative paths are the devil

* add todo

tests/test_image_transforms.py

@@ -17,16 +17,13 @@ import unittest
 import numpy as np
 from parameterized import parameterized
 
-from transformers.testing_utils import require_flax, require_torch, require_vision
-from transformers.utils.import_utils import is_flax_available, is_torch_available, is_vision_available
+from transformers.testing_utils import require_torch, require_vision
+from transformers.utils.import_utils import is_torch_available, is_vision_available
 
 
 if is_torch_available():
     import torch
 
-if is_flax_available():
-    import jax
-
 if is_vision_available():
     import PIL.Image
 
@@ -133,21 +130,6 @@ class ImageTransformsTester(unittest.TestCase):
         self.assertIsInstance(pil_image, PIL.Image.Image)
         self.assertEqual(pil_image.size, (5, 4))
 
-    @require_flax
-    def test_to_pil_image_from_jax(self):
-        key = jax.random.PRNGKey(0)
-        # channel first
-        image = jax.random.uniform(key, (3, 4, 5))
-        pil_image = to_pil_image(image)
-        self.assertIsInstance(pil_image, PIL.Image.Image)
-        self.assertEqual(pil_image.size, (5, 4))
-
-        # channel last
-        image = jax.random.uniform(key, (4, 5, 3))
-        pil_image = to_pil_image(image)
-        self.assertIsInstance(pil_image, PIL.Image.Image)
-        self.assertEqual(pil_image.size, (5, 4))
-
     def test_to_channel_dimension_format(self):
         # Test that function doesn't reorder if channel dim matches the input.
         image = np.random.rand(3, 4, 5)