Remove remaining deprecated libvirt parameter

This parameter was deprecated during 2023.1 cycle when we removed
the other libvirt parameters[1], and has had no effect since then.

[1] 2e0ea37ad5

Change-Id: Ic656dab4fc49875544289f405f16c7e8a1a11a7c

manifests/compute/libvirt.pp

@@ -229,13 +229,6 @@
 #   reboot request is made.
 #   Defaults to $facts['os_service_default']
 #
-# DEPRECATED PARAMETERS
-#
-# [*modular_libvirt*]
-#   (optional) Whether to enable modular libvirt daemons or use monolithic
-#   libvirt daemon.
-#   Defaults to undef
-#
 class nova::compute::libvirt (
   $ensure_package                             = 'present',
   $virt_type                                  = 'kvm',
@@ -281,8 +274,6 @@ class nova::compute::libvirt (
   $max_queues                                 = $facts['os_service_default'],
   $num_memory_encrypted_guests                = $facts['os_service_default'],
   $wait_soft_reboot_seconds                   = $facts['os_service_default'],
-  # DEPRECATED PARAMETERS
-  $modular_libvirt                            = undef,
 ) inherits nova::params {
 
   include nova::deps
@@ -291,10 +282,6 @@ class nova::compute::libvirt (
   validate_legacy(Boolean, 'validate_bool', $migration_support)
   validate_legacy(Boolean, 'validate_bool', $manage_libvirt_services)
 
-  if $modular_libvirt != undef {
-    warning('The modular_libvirt parameter has been deprecated and has no effect.')
-  }
-
   # cpu_mode has different defaults depending on hypervisor.
   if !$cpu_mode {
     case $virt_type {

releasenotes/notes/libvirt-opts-further-cleanup-822207eb74910cff.yaml

@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    The ``nova::compute::libvirt::modular_libvirt`` parameter has been removed.