Merge branch 'bugfix/2020-07_v-delete-mail-domain-ssl' into staging/fixes

bin/v-delete-mail-domain-ssl

@@ -33,7 +33,6 @@ is_object_unsuspended 'user' 'USER' "$user"
 is_object_valid 'mail' 'DOMAIN' "$domain"
 is_object_unsuspended 'mail' 'DOMAIN' "$domain"
 is_object_value_exist 'mail' 'DOMAIN' "$domain" '$SSL'
-is_object_value_exist 'mail' 'DOMAIN' "$domain" '$LETSENCRYPT'
 
 # Perform verification if read-only mode is enabled
 check_hestia_demo_mode