go to appearance>editor>style.css
find the line .categories-mask and .categories-mask span.more
and add the attribute visibilty: hidden;
and if you want to edit the words of whats written…
go through ftp or file-manager and find the following file
wp-content/themes/royal/woocommerce/content-product_cat.php
hit ctrl-f in your browser and search for the terms read more (if this is the demo content)
and change the wording to your liking…