Portfolio "Show all", delete item

Hide link Show all in project, I added this custom css
body .project-filter li:first-child{
display: none;
The code helped link show all hidden, but when you load the page, portfolio image remained all, click on the category link all shows fine, and all the image does not show. How to completely remove the category of “Show all”

Hello there,

Please share a link to site here. So I can inspect and get the exact code to suggest.