Disable all scripts and styles?

I use nextgen gallery in a multisite. How can I disable all scripts and styles?
These thing are loaded in the code of my main page:

<link rel='stylesheet' id='NextGEN-css'  href='https://mysite.com/wp-content/plugins/nextgen-gallery/css/nggallery.css?ver=1.0.0' type='text/css' media='screen' />

<script type='text/javascript' src='https://mysite.com/wp-content/plugins/nextgen-gallery/js/jquery.cycle.all.min.js?ver=2.9995'></script>

<script type='text/javascript' src='https://mysite.com/wp-content/plugins/nextgen-gallery/js/ngg.slideshow.min.js?ver=1.06'></script>

<!-- <meta name="NextGEN" version="1.9.7" /> -->

https://www.ads-software.com/extend/plugins/nextgen-gallery/