[Bugfix] Misaligned params in TreeAttentionImpl (#22226)

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

Author: DarkLight1337

vllm/v1/attention/backends/tree_attn.py

@@ -4,7 +4,7 @@
 
 import ast
 from dataclasses import dataclass
-from typing import TYPE_CHECKING, Any, Optional
+from typing import TYPE_CHECKING, Optional
 
 import torch
 
@@ -313,15 +313,11 @@ def __init__(
         alibi_slopes: Optional[list[float]],
         sliding_window: Optional[int],
         kv_cache_dtype: str,
-        blocksparse_params: Optional[dict[str, Any]] = None,
         logits_soft_cap: Optional[float] = None,
         attn_type: AttentionType = AttentionType.DECODER,
         kv_sharing_target_layer_name: Optional[str] = None,
         use_irope: bool = False,
     ) -> None:
-        if blocksparse_params is not None:
-            raise ValueError(
-                "TreeAttention does not support block-sparse attention.")
         self.num_heads = num_heads
         self.head_size = head_size
         self.scale = float(scale)