Drop staging-rp-{webapp,deposit} which are declared in gandi

Pergamon is our internal dns server, so it would not be resolvable for the public.

Related to T2747

Test Plan

bin/octocatalog:

bin/octocatalog-diff --octocatalog-diff-args --no-truncate-details --to staging pergamon
Found host pergamon.softwareheritage.org
Cloning into '/tmp/swh-ocd.ejoioovQ/environments/production/data/private'...
done.
Cloning into '/tmp/swh-ocd.ejoioovQ/environments/staging/data/private'...
done.
*** Running octocatalog-diff on host pergamon.softwareheritage.org
I, [2020-11-09T14:44:01.623884 #9275]  INFO -- : Catalogs compiled for pergamon.softwareheritage.org
I, [2020-11-09T14:44:08.267931 #9275]  INFO -- : Diffs computed for pergamon.softwareheritage.org
diff origin/production/pergamon.softwareheritage.org current/pergamon.softwareheritage.org
*******************************************
  File[/etc/bind/keys/local-update] =>
   parameters =>
     content =>
      @@ -2,4 +2,4 @@
       key local-update {
        algorithm hmac-sha256;
      - secret "YWLFhVSDDKVZJbvrN6EpvZY9yleOKsjwHEBhIdbWY7a1giVQniH8vd3gylu9FmY6YVfaZgOiq+37rAValYe9Sg==";
      + secret "UhxonmiVAs0KB6lFGCYn7VKkqMgWnWzOORMLJAavuFzxkynwNB8dggGIZO5mmt3buyUZK68Qs6ZzX0ns9KOX4w==";
       };
*******************************************
  File[/etc/bind/rndc.key] =>
   parameters =>
     content =>
      @@ -2,4 +2,4 @@
       key rndc-key {
        algorithm hmac-md5;
      - secret "A2tFtzpJ0FV5bBO1b2GsXJ/2bJ5PlfVQmdMqHqbdbnukViad7yAZaux2qS+KaO9Es/DQnN2BPC3D4ogTYMTeig==";
      + secret "bn2XRK6kVJKiKUttYctzNMXPRFzD4VmJ2ovMkwVeSktER60VBfO2PlBoIHYngyvD2YzdmeDGlPVcvNsR0AzVwg==";
       };
*******************************************
- Resource_record[staging-rp-deposit/A]
*******************************************
- Resource_record[staging-rp-webapp/A]
*******************************************
*** End octocatalog-diff on pergamon.softwareheritage.org

---

Migrated from D4449 (view on Phabricator)