Purge unused ModelTester code (#37085)

* Purge correctly this time

* Remove more methods from recent PRs

* make fixup

tests/models/roc_bert/test_modeling_roc_bert.py

@@ -259,33 +259,6 @@ class RoCBertModelTester:
         )
         self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, self.seq_length, self.hidden_size))
 
-    def create_and_check_for_causal_lm(
-        self,
-        config,
-        input_ids,
-        input_shape_ids,
-        input_pronunciation_ids,
-        token_type_ids,
-        input_mask,
-        sequence_labels,
-        token_labels,
-        choice_labels,
-        encoder_hidden_states,
-        encoder_attention_mask,
-    ):
-        model = RoCBertForCausalLM(config=config)
-        model.to(torch_device)
-        model.eval()
-        result = model(
-            input_ids,
-            input_shape_ids=input_shape_ids,
-            input_pronunciation_ids=input_pronunciation_ids,
-            attention_mask=input_mask,
-            token_type_ids=token_type_ids,
-            labels=token_labels,
-        )
-        self.parent.assertEqual(result.logits.shape, (self.batch_size, self.seq_length, self.vocab_size))
-
     def create_and_check_for_masked_lm(
         self,
         config,