Remove old badges (#2218)
Remove old badges (#2218)

Remove Travis-CI because the tests take too long and usually time out.
Remove AppVeyor because the account was disabled.
quartzmo/google-cloud-ruby,dazuma/google-cloud-ruby,googleapis/google-cloud-ruby,googleapis/google-cloud-ruby,googleapis/google-cloud-ruby,googleapis/google-cloud-ruby,dazuma/google-cloud-ruby,dazuma/google-cloud-ruby,googleapis/google-cloud-ruby,quartzmo/google-cloud-ruby,googleapis/google-cloud-ruby,dazuma/google-cloud-ruby,dazuma/google-cloud-ruby,quartzmo/google-cloud-ruby,dazuma/google-cloud-ruby,quartzmo/google-cloud-ruby,quartzmo/google-cloud-ruby,blowmage/gcloud-ruby,quartzmo/google-cloud-ruby,quartzmo/gcloud-ruby