remove legacy code

Context/Factories/Legacy.meta

@@ -1,9 +0,0 @@
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-folderAsset: yes
-timeCreated: 1466179612
-licenseType: Pro
-DefaultImporter:
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Context/IUnityContextHierarchyChangedListener.cs

@@ -1,11 +0,0 @@
-using UnityEngine;
-
-namespace Svelto.Context.Legacy
-{
-    public interface IUnityContextHierarchyChangedListener
-    {
-        void OnMonobehaviourAdded(MonoBehaviour component);
-
-        void OnMonobehaviourRemoved(MonoBehaviour component);
-    }
-}

Context/IUnityContextHierarchyChangedListener.cs.meta

@@ -1,8 +0,0 @@
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-MonoImporter:
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-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 

Context/Unity/NotifyComponentsRemoved.cs

@@ -1,30 +0,0 @@
-using Svelto.DataStructures;
-using UnityEngine;
-
-namespace Svelto.Context.Legacy
-{
-    public class NotifyComponentsRemoved : MonoBehaviour
-    {
-        public WeakReference<IUnityContextHierarchyChangedListener> unityContext { private get; set; }
-
-        void Start()
-        {
-            if (unityContext == null)
-            {
-                Destroy(this);
-            }
-        }
-
-        void OnDestroy()
-        {
-            if (unityContext == null || unityContext.IsAlive == false)
-                return;
-
-            MonoBehaviour[] components = gameObject.GetComponents<MonoBehaviour>();
-
-            for (int i = 0; i < components.Length; ++i)
-                if (components[i] != null)
-                    unityContext.Target.OnMonobehaviourRemoved(components[i]);
-        }
-    }
-}

Context/Unity/NotifyComponentsRemoved.cs.meta

@@ -1,8 +0,0 @@
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