I'm getting an "Insufficient HTTPS coverage on your site" error in my domain property in Google Page Experience, which is strange because my entire site uses HTTPS and has done so for a long time. So I go and search for HTTP only URLs in my site... but the only ones that Google shows me are pages that already have HTTPS versions. For example: if my site is https://example.com, Google is showing me http://example.com as an HTTP page in my site.
Now, all my HTTP URLs are redirected using 301 to the proper HTTPS ones, and have been for a long time. The only thing I didn't do was to remove my HTTP site property when I migrated years ago; I just added a new HTTPS site property.
What do I do now with Google's warning? Do I ignore it? Do I remove the HTTP property?