[EPLB] Drop defensive getattr for ep_dispatch_algorithm (#31804)

Co-authored-by: Brayden Zhong <b8zhong@uwaterloo.ca>

python/sglang/srt/layers/moe/hash_topk.py

@@ -254,8 +254,7 @@ class HashTopK(nn.Module):
         log2phy_prob = None
         if (
             expert_location_dispatch_info is not None
-            and getattr(expert_location_dispatch_info, "ep_dispatch_algorithm", None)
-            == "lp"
+            and expert_location_dispatch_info.ep_dispatch_algorithm == "lp"
         ):
             if self.layer_id is None:
                 raise RuntimeError("HashTopK LP dispatch requires layer_id.")

python/sglang/srt/layers/moe/topk.py

@@ -2147,8 +2147,7 @@ def _post_process_topk_ids(
         log2phy_prob = None
         if (
             expert_location_dispatch_info is not None
-            and getattr(expert_location_dispatch_info, "ep_dispatch_algorithm", None)
-            == "lp"
+            and expert_location_dispatch_info.ep_dispatch_algorithm == "lp"
         ):
             from sglang.srt.eplb.lplb_solver import get_global_lplb_solver