Remove un-used presenters

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Presenters/GraphAnchorPresenter.cs

-using System;
-using UnityEditor.Experimental.UIElements.GraphView;
-using UnityEngine;
-using UnityEngine.Graphing;
-using UnityEngine.MaterialGraph;
-
-namespace UnityEditor.MaterialGraph.Drawing
-{
-    internal static class MyNodeAdapters
-    {
-        internal static bool Adapt(this NodeAdapter value, PortSource<Vector4> a, PortSource<Vector4> b)
-        {
-            return true;
-        }
-    }
-
-    // TODO JOCE Use GraphView's Input and Output node anchors instead.
-
-    [Serializable]
-    public class GraphAnchorPresenter : NodeAnchorPresenter
-    {
-        protected GraphAnchorPresenter()
-        {}
-
-        public ISlot slot { get; private set; }
-
-        public void Initialize(ISlot slot)
-        {
-            this.slot = slot;
-            name = slot.displayName;
-            anchorType = typeof(Vector4);
-            m_Direction = slot.isInputSlot ? Direction.Input : Direction.Output;
-        }
-
-        Direction m_Direction;
-
-        public override Direction direction
-        {
-            get { return m_Direction; }
-        }
-
-        ShaderStage m_ShaderStage;
-
-        public ShaderStage shaderStage
-        {
-            get { return m_ShaderStage; }
-            set { m_ShaderStage = value; }
-        }
-    }
-}

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Presenters/GraphAnchorPresenter.cs.meta

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-guid: f04b4288b3bfba3408bdc318de3a50b1
-timeCreated: 1476707367
-licenseType: Pro
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-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
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MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Presenters/GraphEdgePresenter.cs

-using System;
-using UnityEditor.Experimental.UIElements.GraphView;
-
-namespace UnityEditor.MaterialGraph.Drawing
-{
-    [Serializable]
-    public class GraphEdgePresenter : EdgePresenter
-    {
-        protected GraphEdgePresenter()
-        {}
-
-        public UnityEngine.Graphing.IEdge edge { get; private set; }
-
-        public void Initialize(UnityEngine.Graphing.IEdge inEdge)
-        {
-            edge = inEdge;
-        }
-    }
-}

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Presenters/GraphEdgePresenter.cs.meta

-fileFormatVersion: 2
-guid: 4b9ded26d428ffa49b4c9569437e5b49
-timeCreated: 1476708486
-licenseType: Pro
-MonoImporter:
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: