Remove V0 Encoder-Decoder Support (#24907)

Signed-off-by: Woosuk Kwon <woosuk@thinkingmachines.ai>

tests/test_config.py

@@ -299,9 +299,8 @@ def test_rope_customization():
                     reason="Encoder Decoder models not supported on ROCm.")
 @pytest.mark.parametrize(("model_id", "is_encoder_decoder"), [
     ("facebook/opt-125m", False),
-    ("facebook/bart-base", True),
+    ("openai/whisper-tiny", True),
     ("meta-llama/Llama-3.2-1B-Instruct", False),
-    ("meta-llama/Llama-3.2-11B-Vision", True),
 ])
 def test_is_encoder_decoder(model_id, is_encoder_decoder):
     config = ModelConfig(model_id)