v6 build fixes

Container.Version.6.0.x.csproj

@@ -33,6 +33,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Compile Remove="Container\Extension\BuilderAware\BuilderStrategy.cs" />
+    <Compile Remove="Lifetime\Data\LifetimeContainer.cs" />
     <Compile Remove="Patterns\Abstractions\Resolvers\ValidatingResolverFactory.cs" />
     <Compile Remove="Patterns\Abstractions\Resolvers\ValidatintResolver.cs" />
     <Compile Remove="Patterns\Dependency\DefaultAttribute.cs" />

Container/Extension/Extensions/SpyExtension.cs

@@ -87,7 +87,7 @@ namespace Regression.Container
 
         protected override void Initialize()
         {
-            Context.Strategies.Add(this._strategy, this._stage);
+            Context.Strategies.Add(this._strategy, (UnityBuildStage)this._stage);
             
             if (_policy != null)
                 Context.Policies.Set(null, _policyType, _policy);

Lifetime/Data/LifetimeContainer.cs

@@ -10,7 +10,7 @@ using Unity.Lifetime;
 
 namespace Unity.Storage
 {
-    public class LifetimeContainer : List<IDisposable>, ILifetimeContainer
+    public class LifetimeContainer : List<IDisposable>
 #if UNITY_V5 || UNITY_V6
         , ILifetimeContainer
 #endif
@@ -40,15 +40,5 @@ namespace Unity.Storage
             if (item is IDisposable disposable)
                 base.Remove(disposable);
         }
-
-        void ILifetimeContainer.Remove(IDisposable item)
-        {
-            Remove(item);
-        }
-
-#if UNITY_V5 || UNITY_V6
-        IEnumerator IEnumerable.GetEnumerator()
-            => base.GetEnumerator();
-#endif
     }
 }