Remve router gemm output dtype conversion (#8204)

python/sglang/srt/models/deepseek_v2.py

@@ -254,9 +254,8 @@ class MoEGate(nn.Module):
             and self.weight.shape[0] == 256
             and _device_sm >= 90
         ):
-            logits = dsv3_router_gemm(hidden_states, self.weight).to(
-                hidden_states.dtype
-            )
+            # router gemm output float32
+            logits = dsv3_router_gemm(hidden_states, self.weight)
         else:
             logits = F.linear(hidden_states, self.weight, None)