Some blocks in published pages do not exist

[alexcarol]

All of these pages appear in the sitemap, so they are being indexed by google.

• callout (https://www.aem.live/business/helix-is-green)
• quote (https://www.aem.live/business/content-velocity)
• gnav-brand (https://www.aem.live/gnav)
• adobe-logo (https://www.aem.live/gnav)
• adobe-cta (https://www.aem.live/new-nav)

Context: found using https://github.com/alexcarol/sidekick-library-generator (it generates the library, but reports any blocks found that don't exist in the code).
The url provided is just the first url where the block is found, but there could be more than one instance of the block on the site.