Removes all dependencies on engine component events. (#4199)

Content.Shared/Movement/RelayMovementEntityMessage.cs

@@ -0,0 +1,18 @@
+using System;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Movement
+{
+    [Obsolete("Component Messages are deprecated, use Entity Events instead.")]
+    public class RelayMovementEntityMessage : ComponentMessage
+    {
+        [PublicAPI]
+        public readonly IEntity Entity;
+
+        public RelayMovementEntityMessage(IEntity entity)
+        {
+            Entity = entity;
+        }
+    }
+}