Removed all references to libktx.js

Viewer/tests/validation/validate.html

@@ -6,7 +6,6 @@
 	<script src="https://preview.babylonjs.com/ammo.js"></script>
 	<script src="https://preview.babylonjs.com/cannon.js"></script>
     <script src="https://preview.babylonjs.com/Oimo.js"></script>
-	<script src="https://preview.babylonjs.com/libktx.js"></script>
     <script src="https://preview.babylonjs.com/babylon.js"></script>
     <script src="https://preview.babylonjs.com/inspector/babylon.inspector.bundle.js"></script>
 

localDev/index-views.html

@@ -10,7 +10,6 @@
     <script src="../dist/preview%20release/Oimo.js"></script>
     <script src="../dist/preview%20release/ammo.js"></script>
     <script src="../dist/preview%20release/recast.js"></script>
-    <script src="../dist/preview%20release/libktx.js"></script>
     <script src="../Tools/DevLoader/BabylonLoader.js"></script>
 
     <style>

localDev/index.html

@@ -10,7 +10,6 @@
     <script src="../dist/preview%20release/Oimo.js"></script>
     <script src="../dist/preview%20release/ammo.js"></script>
     <script src="../dist/preview%20release/recast.js"></script>
-    <script src="../dist/preview%20release/libktx.js"></script>
     <script src="../Tools/DevLoader/BabylonLoader.js"></script>
 
     <style>

sandbox/public/index-local.html

@@ -9,7 +9,6 @@
     <link rel="stylesheet" href="https://use.typekit.net/cta4xsb.css">
     <link rel="shortcut icon" href="https://www.babylonjs.com/favicon.ico">
     <script src="https://code.jquery.com/pep/0.4.2/pep.min.js"></script>
-    <script src="../../dist/preview%20release/libktx.js"></script>
     <script src="../../Tools/DevLoader/BabylonLoader.js"></script>
     <style>
         html,

sandbox/public/index.html

@@ -14,7 +14,6 @@
     <script src="https://preview.babylonjs.com/ammo.js"></script>
     <script src="https://preview.babylonjs.com/cannon.js"></script>
     <script src="https://preview.babylonjs.com/Oimo.js"></script>
-    <script src="https://preview.babylonjs.com/libktx.js"></script>
     <script src="https://preview.babylonjs.com/babylon.js"></script>
 
     <script src="https://preview.babylonjs.com/loaders/babylonjs.loaders.min.js"></script>

tests/validation/validate.html

@@ -9,7 +9,6 @@
 	<script src="https://preview.babylonjs.com/ammo.js"></script>
 	<script src="https://preview.babylonjs.com/cannon.js"></script>
 	<script src="https://preview.babylonjs.com/Oimo.js"></script>
-	<script src="https://preview.babylonjs.com/libktx.js"></script>
 	<script src="https://preview.babylonjs.com/babylon.js"></script>
 	<script src="https://preview.babylonjs.com/inspector/babylon.inspector.bundle.js"></script>