remove unused vendored assets

Author: mockdeep

app/assets/javascripts/application.js

@@ -1,6 +1,5 @@
 //= require jquery.min.js
 //= require bootstrap.min.js
-//= require bootstrap.file-input.js
 //= require mousetrap.js
 //= require jquery.visible.min.js
 //= require underscore.js