[Deprecation] Remove deprecated items related to pooling (#33477)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

vllm/pooling_params.py

@@ -7,7 +7,6 @@ from typing import Annotated, Any
 import msgspec
 
 from vllm.config import ModelConfig, PoolerConfig
-from vllm.config.pooler import get_use_activation
 from vllm.sampling_params import RequestOutputKind
 from vllm.tasks import PoolingTask
 
@@ -24,30 +23,24 @@ class PoolingParams(
             Set to -1 to use the model's default truncation size.
             Set to k to keep only the last k tokens (left truncation).
             Set to None to disable truncation.
+        use_activation: Whether to apply activation function to the pooler outputs.
+            `None` uses the pooler's default, which is `True` in most cases.
         dimensions: Reduce the dimensions of embeddings
             if model support matryoshka representation.
-        normalize: Deprecated, please use use_activation instead.
-        softmax: Deprecated, please use use_activation instead.
-        activation: Deprecated, please use use_activation instead.
-        use_activation: Whether to apply activation function to
-            the classification outputs.
     """
 
     # --8<-- [start:common-pooling-params]
     truncate_prompt_tokens: Annotated[int, msgspec.Meta(ge=-1)] | None = None
+    use_activation: bool | None = None
     # --8<-- [end:common-pooling-params]
 
     ## for embeddings models
     # --8<-- [start:embed-pooling-params]
     dimensions: int | None = None
-    normalize: bool | None = None
     # --8<-- [end:embed-pooling-params]
 
     ## for classification, scoring and rerank
     # --8<-- [start:classify-pooling-params]
-    softmax: bool | None = None
-    activation: bool | None = None
-    use_activation: bool | None = None
     # --8<-- [end:classify-pooling-params]
 
     ## for step pooling models
@@ -88,9 +81,6 @@ class PoolingParams(
             msg = f"You cannot overwrite {self.task=!r} with {task=!r}!"
             raise ValueError(msg)
 
-        # raise deprecated warning for softmax and activation
-        self.use_activation = get_use_activation(self)
-
         # plugin task uses io_processor.parse_request to verify inputs,
         # skipping PoolingParams verify
         if self.task == "plugin":