Prestashop module
You can remove standard/non-standard Prestashop css/js. Configure which files should be removed by settings.xml inside.
Settings have only two main nodes and . Both have node inside which you can paste unneeded css/js.
Instead of and node, node is unlimited.
Standard xml file look:
<settings>
<cssFiles>
<path> /themes/your_theme_name/css/global.css </path>
<path> /themes/your_theme_name/css/modules/blocktopmenu/css/blocktopmenu.css </path>
<path> /themes/your_theme_name/css/modules/blocktopmenu/css/superfish-modified.css </path>
</cssFiles>
<jsFiles>
<path> /themes/your_theme_name/js_to_remove.js </path>
</jsFiles>
</settings>