Unused ccs loading

Good morning, I am getting a performance improvement on all checks to reduce unused css for the following item

/ Theme Name: Entrada Child - Modern Theme URI: Tour Tavel Booking WordPress Theme | Entrada Author: …*

Where can I find this, can I remove it?

Thanks a lot in advance for your help

Hello, the file is your custom css inside wp-content/themes/entrada-child/style.css Thank you