Remove incorrect deep_gemm assertions from server_args.py (#14113)

Co-authored-by: Kangyan Zhou <zky314343421@gmail.com>

python/sglang/srt/server_args.py

@@ -1517,11 +1517,6 @@ class ServerArgs:
                 self.ep_size == 1
             ), "FP8 Cutlass MoE is only supported with ep_size == 1"
 
-        if self.moe_runner_backend == "deep_gemm":
-            assert (
-                self.ep_size > 1 and self.moe_a2a_backend == "deepep"
-            ), "DeepGemm MoE runner is only supported when ep is enabled and moe_a2a_backend is deepep"
-
     def _handle_a2a_moe(self):
         if self.moe_a2a_backend == "deepep":
             if self.deepep_mode == "normal":