Revert "require https for external links"
Revert "require https for external links"

This reverts commit bb0bb92b51e3aad94a2f405d5492ce3e46f8fc70.

Remove actual test for now, as it causes failures in CI, where github.com links get generated as http

Eventually this should be fixed with https://github.com/github/pages-gem/pull/611 or similar

github/choosealicense.com,github/choosealicense.com,github/choosealicense.com