Clean up deprecation warnings (#19654)

* Clean up deprecation warnings

Notes:
Changed some strings in tests to raw strings, which will change the literal content of the strings as they are fed into whatever machine handles them.
Test cases for past in the past/past_key_values switch changed/removed due to warning of impending removal

* Add PILImageResampling abstraction for PIL.Image.Resampling

tests/models/beit/test_modeling_flax_beit.py

@@ -233,7 +233,7 @@ class FlaxBeitModelIntegrationTest(unittest.TestCase):
         pixel_values = feature_extractor(images=image, return_tensors="np").pixel_values
 
         # prepare bool_masked_pos
-        bool_masked_pos = np.ones((1, 196), dtype=np.bool)
+        bool_masked_pos = np.ones((1, 196), dtype=bool)
 
         # forward pass
         outputs = model(pixel_values=pixel_values, bool_masked_pos=bool_masked_pos)

tests/models/flava/test_feature_extraction_flava.py

@@ -31,6 +31,7 @@ if is_vision_available():
     from PIL import Image
 
     from transformers import FlavaFeatureExtractor
+    from transformers.image_utils import PILImageResampling
     from transformers.models.flava.feature_extraction_flava import (
         FLAVA_CODEBOOK_MEAN,
         FLAVA_CODEBOOK_STD,
@@ -80,7 +81,7 @@ class FlavaFeatureExtractionTester(unittest.TestCase):
         self.min_resolution = min_resolution
         self.max_resolution = max_resolution
         self.size = size
-        self.resample = resample if resample is not None else Image.BICUBIC
+        self.resample = resample if resample is not None else PILImageResampling.BICUBIC
         self.do_normalize = do_normalize
         self.image_mean = image_mean
         self.image_std = image_std
@@ -96,7 +97,7 @@ class FlavaFeatureExtractionTester(unittest.TestCase):
 
         self.codebook_do_resize = codebook_do_resize
         self.codebook_size = codebook_size
-        self.codebook_resample = codebook_resample if codebook_resample is not None else Image.LANCZOS
+        self.codebook_resample = codebook_resample if codebook_resample is not None else PILImageResampling.LANCZOS
         self.codebook_do_center_crop = codebook_do_center_crop
         self.codebook_crop_size = codebook_crop_size
         self.codebook_do_map_pixels = codebook_do_map_pixels

tests/models/wav2vec2/test_modeling_flax_wav2vec2.py

@@ -362,7 +362,7 @@ class FlaxWav2Vec2UtilsTest(unittest.TestCase):
         self.assertTrue(abs(ppl.item() - 141.4291) < 1e-3)
 
         # mask half of the input
-        mask = np.ones((2,), dtype=np.bool)
+        mask = np.ones((2,), dtype=bool)
         mask[0] = 0
 
         ppl = FlaxWav2Vec2GumbelVectorQuantizer._compute_perplexity(probs, mask)