Update ExternallyControlledLifetimeManager.cs

Author: ENikS

src/Lifetime/ExternallyControlledLifetimeManager.cs

@@ -32,16 +32,6 @@ public override void SetValue(object newValue, ILifetimeContainer container = nu
             _value = new WeakReference(newValue);
         }
 
-        /// <summary>
-        /// Remove the given object from backing store.
-        /// </summary>
-        /// <param name="container">Instance of container</param>
-        public override void RemoveValue(ILifetimeContainer container = null)
-        {
-            // DO NOTHING - we don't own this instance.
-        }
-
-
         protected override LifetimeManager OnCreateLifetimeManager()
         {
             return new ExternallyControlledLifetimeManager();