Turn @config into a dataclass_transform (#31541)

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

vllm/config/pooler.py

@@ -3,8 +3,6 @@
 
 from typing import Any, Literal, get_args
 
-from pydantic.dataclasses import dataclass
-
 from vllm.config.utils import config
 from vllm.logger import init_logger
 from vllm.utils.hashing import safe_hash
@@ -19,7 +17,6 @@ TOK_POOLING_TYPES: tuple[TokenPoolingType, ...] = get_args(TokenPoolingType)
 
 
 @config
-@dataclass
 class PoolerConfig:
     """Controls the behavior of output pooling in pooling models."""