Updated System implementations

Author: jeffreylanters

Runtime/EntitySystem.cs

@@ -247,16 +247,6 @@ public EntityComponentType MatchEntity (System.Predicate<EntityComponentType> ma
       return matchedEntity;
     }
 
-    /// <summary>
-    /// Starts a coroutine on this system.
-    /// </summary>
-    /// <param name="routine">The coroutine to start.</param>
-    /// <returns>The coroutine.</returns>
-    public Coroutine StartCoroutine (IEnumerator routine) {
-      // Start the coroutine on the controller.
-      return Controller.Instance.StartCoroutine (routine);
-    }
-
     /// <summary>
     /// Starts a coroutine on this system.
     /// </summary>