VS Web sites/projects come loaded with several .js files, most of which I don’t use (e.g., I use a CDN for newer versions of jQuery and jQuery-UI). I know it’s safe to remove these unneeded .js files from my projects, but is there any benefit from doing so? Are they deployed to the web server if left alone?
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yes, it’s take time to load and cause to reduce the performance , other way to reduce it you can compile multiple js files in to one.please refer
https://developers.google.com/speed/articles/compressing-javascript
http://closure-compiler.appspot.com/home
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