diff --git a/common/deploy-steps.j2 b/common/deploy-steps.j2
index fea59a2573..e7533d1741 100644
--- a/common/deploy-steps.j2
+++ b/common/deploy-steps.j2
@@ -139,13 +139,6 @@ parameters:
     default: ''
     description: A map of role name to a space separated list of IP addresses used to ping test each available network interface.
     type: json
-  StackAction:
-    type: string
-    description: >
-      Heat action on performed top-level stack.  Note StackUpdateType is
-      set to UPGRADE when a major-version upgrade is in progress.
-    constraints:
-    - allowed_values: ['CREATE', 'UPDATE']
   NetworkSafeDefaults:
     default: true
     description: Allow to enable/disable safe networking defaults if os-net-config would fail to run with the provided config.
@@ -167,14 +160,6 @@ parameters:
   AnsibleHostVarsMap:
     type: json
     default: {}
-  StackUpdateType:
-    type: string
-    description: >
-      Type of update, to differentiate between UPGRADE and UPDATE cases
-      when StackAction is UPDATE (both are the same stack action).
-    constraints:
-    - allowed_values: ['', 'UPGRADE']
-    default: ''
   ContainerCli:
     type: string
     default: 'podman'
@@ -390,14 +375,12 @@ outputs:
         validate_fqdn: {get_param: ValidateFqdn}
         ping_test_gateway_ips: {get_param: PingTestGatewayIPsMap}
         ping_test_ips: {get_param: PingTestIpsMap}
-        stack_action: {get_param: StackAction}
         network_safe_defaults: {get_param: NetworkSafeDefaults}
         deploy_artifact_urls: {get_param: DeployArtifactURLs}
         deploy_artifact_files: {get_param: DeployArtifactFILEs}
         hosts_entry: {get_param: HostsEntry}
         primary_role_name: {{ primary_role_name }}
         deploy_identifier: {get_param: DeployIdentifier}
-        stack_update_type: {get_param: StackUpdateType}
         container_cli: {get_param: ContainerCli}
         enabled_services: {get_param: EnabledServices}
         control_virtual_ip: {get_param: ControlVirtualIP}
@@ -616,7 +599,6 @@ outputs:
                     name: tripleo_network_config
                   vars:
                     tripleo_network_config_script_path: "{{ NetworkConfig_stat.stat.path }}"
-                    tripleo_network_config_action: "{{ stack_action }}"
                     tripleo_network_config_update: "{{ network_config_update }}"
                     tripleo_network_config_async_timeout: "{{ async_timeout | default(300) }}"
                     tripleo_network_config_async_poll: "{{ async_poll | default(3) }}"
diff --git a/deployment/ceph-ansible/ceph-base.yaml b/deployment/ceph-ansible/ceph-base.yaml
index 0f5d9be568..aa370ce990 100644
--- a/deployment/ceph-ansible/ceph-base.yaml
+++ b/deployment/ceph-ansible/ceph-base.yaml
@@ -35,14 +35,6 @@ parameters:
     description: Mapping of service endpoint -> protocol. Typically set
                  via parameter_defaults in the resource registry.
     type: json
-  StackUpdateType:
-    type: string
-    description: >
-      Type of update, to differentiate between UPGRADE and UPDATE cases
-      when StackAction is UPDATE (both are the same stack action).
-    constraints:
-    - allowed_values: ['', 'UPGRADE']
-    default: ''
   NodeDataLookup:
     type: json
     default: {}
@@ -390,8 +382,6 @@ conditions:
     yaql:
       data: {get_param: ContainerCephDaemonImage}
       expression: $.data.split('/')[0].matches('(\.|:)')
-  perform_upgrade:
-    equals: [{get_param: StackUpdateType}, 'UPGRADE']
   ceph_ansible_skip_tags_set:
     not:
       equals:
diff --git a/deployment/cephadm/ceph-base.yaml b/deployment/cephadm/ceph-base.yaml
index 2746307a7e..de3e022673 100644
--- a/deployment/cephadm/ceph-base.yaml
+++ b/deployment/cephadm/ceph-base.yaml
@@ -30,14 +30,6 @@ parameters:
     description: Mapping of service endpoint -> protocol. Typically set
                  via parameter_defaults in the resource registry.
     type: json
-  StackUpdateType:
-    type: string
-    description: >
-      Type of update, to differentiate between UPGRADE and UPDATE cases
-      when StackAction is UPDATE (both are the same stack action).
-    constraints:
-    - allowed_values: ['', 'UPGRADE']
-    default: ''
   NodeDataLookup:
     type: json
     default: {}
diff --git a/deployment/nova/nova-vnc-proxy-container-puppet.yaml b/deployment/nova/nova-vnc-proxy-container-puppet.yaml
index e85c604f55..1b9b30cfd7 100644
--- a/deployment/nova/nova-vnc-proxy-container-puppet.yaml
+++ b/deployment/nova/nova-vnc-proxy-container-puppet.yaml
@@ -91,14 +91,6 @@ parameters:
                  'default' will use the underlying system OpenSSL defaults.
     constraints:
     - allowed_values: ['default', 'tlsv1_1', 'tlsv1_2', 'tlsv1_3']
-  StackUpdateType:
-    type: string
-    description: >
-      Type of update, to differentiate between UPGRADE and UPDATE cases
-      when StackAction is UPDATE (both are the same stack action).
-    constraints:
-    - allowed_values: ['', 'UPGRADE']
-    default: ''
   RootStackName:
     description: The name of the stack/plan.
     type: string
@@ -124,9 +116,6 @@ conditions:
       equals:
       - {get_param: NovaVNCProxySSLCiphers}
       - ''
-  allow_noauth:
-    # Allow noauth VNC connections during P->Q upgrade. Remove in Rocky.
-    equals: [{get_param: StackUpdateType}, 'UPGRADE']
   key_size_novavnc_override_set:
     not: {equals: [{get_param: NovaVNCCertificateKeySize}, '']}
   key_size_libvirtvnc_override_set:
@@ -203,7 +192,6 @@ outputs:
           - if:
               - use_tls_for_vnc
               - nova::vncproxy::allow_vencrypt: true
-                nova::vncproxy::allow_noauth: {if: [allow_noauth, true, false]}
                 nova::vncproxy::vencrypt_key: /etc/pki/tls/private/libvirt-vnc-client-cert.key
                 nova::vncproxy::vencrypt_cert: /etc/pki/tls/certs/libvirt-vnc-client-cert.crt
                 nova::vncproxy::vencrypt_ca: /etc/pki/CA/certs/vnc.crt
diff --git a/releasenotes/notes/remove-stack-action-parameter-285044bb49ad1f5b.yaml b/releasenotes/notes/remove-stack-action-parameter-285044bb49ad1f5b.yaml
new file mode 100644
index 0000000000..57ed60fea1
--- /dev/null
+++ b/releasenotes/notes/remove-stack-action-parameter-285044bb49ad1f5b.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    The StackAction/StackUpdateType parameters have been removed because they
+    have no significance with deployment using ephemeral heat.