Avoiding Font Overload

In all cases you need to find out where the links are coming from. In the case of fonts, the social icons plugin is clearly the source of a few. Ask in the plugin’s dedicated support channel how to best remove the references. For gstatic fonts, they are possibly loaded by your theme. Verify by switching to a theme that doesn’t use gstatic fonts like twentytwenty.

For the deleted image files, scan your access logs for 404 requests and make note of the referring page. That page needs to have the link removed.

Because icons normally come from a font file, finding a plugin that doesn’t load fonts could be challenging. It would need to use its own, self defined SVG icons, which would likely take up more resource than font files do.

The 404 links could come from theme template files, or the could exist in page content. If you have server terminal access, you can search theme files with the grep command. Or download the theme via FTP to your computer and use its native grep-like text search tools.

To find links in page content, use the Better Search and Replace plugin to seek out the bad links and substitute a link to valid resources.