bind9 backend: Clean up deprecated rndc_host

... and the logics to remove old parameters.

Depends-on: https://review.opendev.org/846491
Change-Id: Ib67b44cb289e75bfed022cec350fd2cd4bb6374b

manifests/backend/bind9.pp

@@ -54,12 +54,6 @@
 #  (Optional) Manage pools.yaml and update pools by designate-manage command
 #  Defaults to true
 #
-# DEPRECATED PARAMETERS
-#
-# [*rndc_host*]
-#  (Optional) RNDC Host
-#  Defaults to undef
-#
 class designate::backend::bind9 (
   $rndc_config_file = '/etc/rndc.conf',
   $rndc_key_file    = '/etc/rndc.key',
@@ -73,8 +67,6 @@ class designate::backend::bind9 (
   $mdns_port        = 5354,
   $configure_bind   = true,
   $manage_pool      = true,
-  # DEPRECATED PARAMETERS
-  $rndc_host        = undef,
 ) {
 
   include designate::deps
@@ -115,19 +107,6 @@ class designate::backend::bind9 (
     })
   }
 
-  # TODO(tkajinam): Remove this after Yoga release.
-  if $rndc_host != undef {
-    warning('The rndc_host parameter is deprecated and has no effect.')
-  }
-
-  # TODO(tkajinam): Remove this after Yoga release.
-  designate_config {
-    'backend:bind9/rndc_host'        : ensure => absent;
-    'backend:bind9/rndc_port'        : ensure => absent;
-    'backend:bind9/rndc_config_file' : ensure => absent;
-    'backend:bind9/rndc_key_file'    : ensure => absent;
-  }
-
   if $manage_pool {
     file { '/etc/designate/pools.yaml':
       ensure  => present,

releasenotes/notes/bind9-backend-cleanup-d7d6656c0f867ef3.yaml

@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    The ``designate::backend::bind9::rndc_host`` parameter has been removed.