MT#65440 Obsolete KeyDB implementation

We no longer support KeyDB, and have switched to Valkey by default since
mr12.5.

Change-Id: Ia3d6b17581b34b2051e9e071be2da38a82190a17

debian/control

@@ -336,7 +336,6 @@ Depends:
  haproxy,
  iptables-persistent,
  kannel,
- keydb-server,
  ldap-utils,
  libavcodec-extra,
  libconfig-inifiles-perl,
@@ -492,7 +491,6 @@ Depends:
  grub-efi | grub-pc,
  iptables-persistent,
  kannel,
- keydb-server,
  libavcodec-extra,
  libconfig-inifiles-perl,
  libpam-systemd,