fix ci bug

Author: chen2016013

paddleformers/transformers/moe_layer.py

@@ -265,9 +265,10 @@ def __init__(
         self.ep_size = dist.get_world_size(self.moe_group)
         self.moe_router_topk = gate.top_k
         self.num_local_experts = moe_num_experts // self.ep_size
-        self.token_dispatcher = MoEFlexTokenDispatcher(
-            self.num_local_experts, self.moe_router_topk, self.moe_num_experts, self.moe_group
-        )
+        if self.moe_group is not None:
+            self.token_dispatcher = MoEFlexTokenDispatcher(
+                self.num_local_experts, self.moe_router_topk, self.moe_num_experts, self.moe_group
+            )
         self.token_drop_steps = config.token_drop_steps
         self.using_flex_token = False