TT#26264 Remove obsolete rc.d symlinks

We removed the init script, let's cleanup fully.

Change-Id: I923e5a9701faa135d886f50760dc72abfe42545b

debian/control

@@ -112,7 +112,6 @@ Depends:
  libuuid-perl,
  libxml-mini-perl,
  libxml-xpath-perl,
- lsb-base (>= 3.0-6),
  ngcp-schema,
  nginx-common,
  openssl,

debian/ngcp-panel.postinst

@@ -5,6 +5,8 @@ set -e
 # don't do anything when called with other argument than configure
 case "$1" in
   configure)
+    # Remove obsolete rc.d links.
+    update-rc.d ngcp-panel remove
   ;;
   abort-upgrade|abort-remove|abort-deconfigure)
     exit 0