Fix XLA and AMP (#10262)

tests/test_modeling_tf_t5.py

@@ -305,14 +305,6 @@ class TFT5ModelTest(TFModelTesterMixin, unittest.TestCase):
         # This test is too long (>30sec) and makes fail the CI
         pass
 
-    def test_mixed_precision(self):
-        # TODO JP: Make T5 float16 compliant
-        pass
-
-    def test_xla_mode(self):
-        # TODO JP: Make T5 XLA compliant
-        pass
-
     @slow
     def test_model_from_pretrained(self):
         model = TFT5Model.from_pretrained("t5-small")
@@ -442,14 +434,6 @@ class TFT5EncoderOnlyModelTest(TFModelTesterMixin, unittest.TestCase):
     def test_train_pipeline_custom_model(self):
         pass
 
-    def test_mixed_precision(self):
-        # TODO JP: Make T5 float16 compliant
-        pass
-
-    def test_xla_mode(self):
-        # TODO JP: Make T5 XLA compliant
-        pass
-
 
 @require_tf
 @require_sentencepiece