修复channel-int8 的config读取bug

vllm/model_executor/layers/fused_moe/config.py

@@ -246,8 +246,8 @@ class FusedMoEQuantConfig:
 
     @property
     def block_shape(self) -> list[int] | None:
-        if self.use_int8_w8a8:
-            return [256, 256]
+        # if self.use_int8_w8a8:
+        #     return [256, 256]
 
         if (
             self._a1.shape is not None
@@ -572,7 +572,7 @@ def int8_w8a8_moe_quant_config(
         a2_scale=a2_scale,
         per_act_token_quant=per_act_token_quant,
         per_out_ch_quant=False,
-        block_shape=[256, 256],
+        block_shape=None,
     )