[Material Graph]Rearrange project.

UnityProject/Assets/GraphFramework/SerializableGraph/Editor/Tests/SerializedGraphTests.cs

 using System;
 using System.Linq;
 using NUnit.Framework;
-using UnityEditor.Graphing;
-namespace UnityEditor.MaterialGraph.Tests
+namespace UnityEditor.Graphing.Tests
 {
     [TestFixture]
     public class ScriptableGraphTests

UnityProject/Assets/UnityShaderEditor/Editor/Source.meta

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