chore(dovecot): drop deleted wheregroup@produktor.io A1 pilot box from owner lists (#252)

config/user-patches.sh

@@ -10,11 +10,11 @@
 # Incubator model (corrected 2026-09-02, issue #252): the incubator mailbox IS
 # the owner's HISTORICAL ADDRESS per period, not an abstract "source" mailbox.
 # The wheregroup period = andriy.oblivantsev@wheregroup.com; later periods get
-# their own account (eslider@gmail.com, ...@viscreation.de, ...).
-# wheregroup@produktor.io stays listed as the superseded A1 pilot box until
-# its 1000 messages are migrated and the account is deleted — grant_share
-# skips owners that are not (yet) in postfix-accounts.cf, so a deleted account
-# is a silent no-op.
+# their own account (eslider@gmail.com, ...@viscreation.de, ...). The A1 pilot
+# box wheregroup@produktor.io (abstract "source" model) was deleted after its
+# 1000 messages were migrated to the historical account — grant_share skips
+# owners that are not (yet) in postfix-accounts.cf, so a not-yet-created
+# account is a silent no-op.
 # DMS runs this only on the FIRST start of each container instance (plain
 # `docker compose restart` skips the setup step by design — /CONTAINER_START
 # marker), so it must stay idempotent. ACLs, the shared dict and subscriptions
@@ -38,7 +38,7 @@ chmod 0770 "${SHARED_DB_DIR}"
 #    when Roundcube moves a deleted message to Trash.
 READER='info@produktor.io'
 PRODUCTION_OWNERS='ano@produktor.io andriy.oblivantsev@produktor.io postmaster@produktor.io'
-INCUBATOR_OWNERS='andriy.oblivantsev@wheregroup.com wheregroup@produktor.io'
+INCUBATOR_OWNERS='andriy.oblivantsev@wheregroup.com'
 
 grant_share() { # $1=owner, remaining=right names
   local owner=$1