What is the purpose of npm.js inside a new Bootstrap project?

Hello guys.

I have just created a new Bootstrap project using WebStorm latest version (2016.3).

Inside js folder I've found a file called npm.js with the following content :

// This file is autogenerated via the `commonjs` Grunt task. You can require() this file in a CommonJS environment.
require('../../js/transition.js')
require('../../js/alert.js')
require('../../js/button.js')
require('../../js/carousel.js')
require('../../js/collapse.js')
require('../../js/dropdown.js')
require('../../js/modal.js')
require('../../js/tooltip.js')
require('../../js/popover.js')
require('../../js/scrollspy.js')
require('../../js/tab.js')
require('../../js/affix.js')

What is the purpose of this file?

Is it ok if I erase it?

Thank you!