Comment out vertex interpolator node

MaterialGraphProject/Assets/NewNodes/Editor/Keep/VertexInterpolatorNode.cs

 using UnityEngine;
 using UnityEditor.Graphing;
 
-namespace UnityEditor.ShaderGraph
+/*namespace UnityEditor.ShaderGraph
 {
     [Title("Vertex Interpolation")]
     public class VertexInterpolatorNode : AbstractMaterialNode
 
         static readonly int[] k_ValidSlots = { InputSlotId, OutputSlotId };
     }
-}
+}*/