结构大修改，改成朴实无华的结构，不过度架构。能跑就行

Assets/Scripts/Fishing2~/Map/Handler/Map2C_RoleExitMapNotifyHandler.cs

@@ -0,0 +1,27 @@
+using Fantasy;
+using Fantasy.Async;
+using Fantasy.Network;
+using Fantasy.Network.Interface;
+using NBC;
+using Log = NBC.Log;
+
+namespace NBF.Fishing2
+{
+    public class Map2C_RoleExitMapNotifyHandler : Message<Map2C_RoleExitRoomNotify>
+    {
+        protected override async FTask Run(Session session, Map2C_RoleExitRoomNotify message)
+        {
+            Log.Info($"收到离开房间推送 id={message.Id} ");
+            var map = App.Main.GetComponent<Map>();
+            if (map == null)
+            {
+                Log.Info("地图不存在，不处理退出请求");
+                return;
+            }
+            if (map.Units.Remove(message.Id, out var unit))
+            {
+                unit.Dispose();
+            }
+        }
+    }
+}