Remove broken link (#9471)

courses/free-courses-ko.md

@@ -143,7 +143,6 @@
 
 ### JavaScript
 
-* [모던 웹을 위한 JavaScript + jQuery](https://www.youtube.com/playlist?list=PLBXuLgInP-5kLy13XLuK8iBWVFDBJygYr)
 * [JavaScript 입문 수업](https://www.youtube.com/playlist?list=PLuHgQVnccGMA4uSig3hCjl7wTDeyIeZVU) (생활코딩)
 * [JavaScript for Web Browser](https://www.youtube.com/playlist?list=PLuHgQVnccGMDTAQ0S_FYxXOi1ZJz4ikaX) (생활코딩)