* update Liquid deprecation fixtures to use new versions
* update module that removes deprecated GHES frontmatter for new versions
* update module that removes deprecated GHES conditionals for new versions
* update script to use new versions and also remove internal-developer checkout option
* update deprecated Liquid tests to use new versions
* remove unnecessary leading slash in getEnterpriseServerNumber pattern
* include a step that runs script/remove-unused-assets.js
* Update script/remove-deprecated-enterprise-version-markup.js
Co-authored-by: Jason Etcovitch <jasonetco@github.com>
* require script instead of execSync
Co-authored-by: Jason Etcovitch <jasonetco@github.com>