ci: Temporarily drop SMTP tests.

Author: alexmv

ci/certbot/test.sh

@@ -35,15 +35,6 @@ if [ "${success}" = "0" ]; then
     exit 1
 fi
 
-## SMTP also has the same cert
-echo | openssl s_client -showcerts -servername zulip.example.net -connect localhost:25 -starttls smtp \
-    | openssl x509 -text -noout \
-    | tee cert.pem
-if ! grep -E "Issuer: CN\s*=\s*Pebble Intermediate CA" cert.pem; then
-    echo "SMTP STARTTLS does not have Pebble-signed certificate!"
-    exit 1
-fi
-
 ## Test renewing -- this should generate and deploy a new certificate
 serial=$(grep "Serial Number:" cert.pem)
 "${docker[@]:?}" exec zulip /usr/bin/certbot renew --force-renew --non-interactive --debug
@@ -54,15 +45,6 @@ if [ "${newserial}" = "${serial}" ]; then
     exit 1
 fi
 
-echo | openssl s_client -showcerts -servername zulip.example.net -connect localhost:25 -starttls smtp \
-    | openssl x509 -text -noout \
-    | tee cert.pem
-smtpserial=$(grep "Serial Number:" cert.pem)
-if [ "${newserial}" != "${smtpserial}" ]; then
-    echo "Serial numbers on HTTPS and SMTP STARTTLS differ after renew"
-    exit 1
-fi
-
 # For simplicity below, we update $serial
 serial="$newserial"