Docs: Remove dead links. (#24445)

docs/manual/ar/introduction/Useful-links.html

@@ -52,9 +52,6 @@
 		 </li>
 		 <li>
 			[Link:https://aerotwist.com/tutorials/ Aerotwist] tutorials by [link:https://github.com/paullewis/ Paul Lewis].
-		 </li>
-			 <li>
-			 [link:http://learningthreejs.com/ Learning Three.js] – مدونة تحتوي على مقالات مخصصة لتدريس three.js
 		 </li>
 		 <li>
 			 [link:https://discourse.threejs.org/t/three-js-bookshelf/2468 Three.js Bookshelf] - هل تبحث عن مزيد من الموارد حول three.js أو رسومات الكمبيوتر بشكل عام؟ تحقق من اختيار الأدبيات التي أوصى بها مجتمع المكتبة.

docs/manual/en/introduction/Useful-links.html

@@ -60,9 +60,6 @@
 		 </li>
 		 <li>
 			[Link:https://aerotwist.com/tutorials/ Aerotwist] tutorials by [link:https://github.com/paullewis/ Paul Lewis].
-		 </li>
-			 <li>
-			 [link:http://learningthreejs.com/ Learning Three.js] – a blog with articles dedicated to teaching three.js
 		 </li>
 		 <li>
 			 [link:https://discourse.threejs.org/t/three-js-bookshelf/2468 Three.js Bookshelf] - Looking for more resources about three.js or computer graphics in general?

docs/manual/ja/introduction/Useful-links.html

@@ -55,9 +55,6 @@
 		 </li>
 		 <li>
 			[Link:https://aerotwist.com/tutorials/ Aerotwist] tutorials by [link:https://github.com/paullewis/ Paul Lewis].
-		 </li>
-			 <li>
-			 [link:http://learningthreejs.com/ Learning Three.js] – a blog with articles dedicated to teaching three.js
 		 </li>
 		 <li>
 			 [link:https://discourse.threejs.org/t/three-js-bookshelf/2468 Three.js Bookshelf] - Looking for more resources about three.js or computer graphics in general?

docs/manual/ko/introduction/Useful-links.html

@@ -56,9 +56,6 @@
 		 </li>
 		 <li>
 			[Link:https://aerotwist.com/tutorials/ Aerotwist] tutorials by [link:https://github.com/paullewis/ Paul Lewis].
-		 </li>
-			 <li>
-			 [link:http://learningthreejs.com/ Learning Three.js] – a blog with articles dedicated to teaching three.js
 		 </li>
 		 <li>
 			 [link:https://discourse.threejs.org/t/three-js-bookshelf/2468 Three.js Bookshelf] - Looking for more resources about three.js or computer graphics in general?

docs/manual/zh/introduction/Useful-links.html

@@ -59,9 +59,6 @@
 		 </li>
 		 <li>
 			[Link:https://aerotwist.com/tutorials/ Aerotwist] tutorials by [link:https://github.com/paullewis/ Paul Lewis].
-		 </li>
-			 <li>
-			 [link:http://learningthreejs.com/ Learning Three.js] – a blog with articles dedicated to teaching three.js
 		 </li>
 		 <li>
 			 [link:https://discourse.threejs.org/t/three-js-bookshelf/2468 Three.js Bookshelf] - Looking for more resources about three.js or computer graphics in general?