Of course, you can remove 11ty Frame demo pages from your personal site you should first have another index and a post tagged page of your own, otherwise you will get an error when building your site. , but if you want to keep them in your source directory for instance to have a handy reference , without building them in your site, you just have to change two lines in their frontmatter section, replacing ex.1 code by ex.2 code:

permalink: ‘install.html’,
tags: [ ‘post’ ],

permalink: false,
tags: [],