I have the same problem. I believe its because I removed the domain from my verified domain list (https://www.google.com/webmasters/verification/home).
Complete steps: 1. Added domain to verified domain list 2. Added custom domain to google app engine app 3. Lost verified domain 4. Button is gray, but I want to delete it to "clean up". -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/9e76e488-fa3a-4a95-b482-e83625962328%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
