By default when you create a child theme for Listify the default CSS for the theme will always be loaded. This is the best way to create a child theme as it promotes proper child theme creation.
You should not be copy/pasting the entire CSS of the parent theme and modifying parts in your child theme. Instead you should use CSS selector specificity to override the default styles. Read more about CSS selector specificity.
If you absolutely must stop the Listify default CSS from loading, you can add the following to your child theme’s