Updated the image path used in the textured scene creation method so …

…that it's more robust.

Revert "Set up platforms for x86 and x64."

This reverts commit 2ab2abd.

Set up platforms for x86 and x64.

tests/SharpGLTF.Core.Tests/Schema2/Authoring/BasicSceneCreationTests.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.IO;
 using System.Numerics;
 
 using NUnit.Framework;
@@ -117,7 +118,14 @@ public void CreateSceneWithTexturedTriangle()
             TestContext.CurrentContext.AttachGltfValidatorLinks();
 
             // we'll use our icon as the source texture
-            var imagePath = System.IO.Path.Combine(TestContext.CurrentContext.WorkDirectory, "..\\..\\..\\..\\..\\build\\Icons\\glTF2Sharp.png");
+            var workDirectory = new DirectoryInfo(TestContext.CurrentContext.WorkDirectory);
+            var testDirectory = workDirectory;
+            do {
+                testDirectory = testDirectory.Parent;
+            } while (testDirectory.Name != "tests");
+            var sharpGltfDirectory = testDirectory.Parent;
+
+            var imagePath = Path.Combine(sharpGltfDirectory.FullName, "build\\Icons\\glTF2Sharp.png");
 
             // create a basic scene
             var model = ModelRoot.CreateModel();