How can I remove unwanted CSS found in the parent theme? I'm working on a sub-theme of Bootstrap Barrio, which includes a table.css stylesheet. I don't want this stylesheet from the parent theme to be included in my sub-theme. 

How do I eliminate a CSS file from sub-theme's parent?
You can override it by adding a blank file with the same name in your theme (or you can add your own contents). Or, you can remove it altogether with libraries exclude: https://www.drupal.org/docs/theming-drupal/adding-stylesheets-css-and-javascript-js-to-a-drupal-theme#override-extend