Remove all references to yapf as it's no longer used (#26251)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

vllm/entrypoints/llm.py

@@ -39,9 +39,6 @@ from vllm.entrypoints.chat_utils import (
     parse_chat_messages,
     resolve_chat_template_content_format,
 )
-
-# yapf conflicts with isort for this block
-# yapf: disable
 from vllm.entrypoints.score_utils import (
     ScoreContentPartParam,
     ScoreMultiModalParam,
@@ -50,8 +47,6 @@ from vllm.entrypoints.score_utils import (
     compress_token_type_ids,
     get_score_prompt,
 )
-
-# yapf: enable
 from vllm.entrypoints.utils import _validate_truncation_size, log_non_default_args
 from vllm.inputs import (
     DataPrompt,