diff --git a/config/general_config/featureset010.yml b/config/general_config/featureset010.yml
index f8c8ca997..1d69ab828 100644
--- a/config/general_config/featureset010.yml
+++ b/config/general_config/featureset010.yml
@@ -2,8 +2,6 @@ deploy_composable_scenario: true
 composable_scenario: multinode-containers.yaml
 composable_services: false
 
-# Undercloud registry mirror
-undercloud_docker_registry_mirror: "{{ lookup('env','NODEPOOL_DOCKER_REGISTRY_PROXY') }}"
 network_isolation: false
 enable_pacemaker: false
 overcloud_ipv6: false
diff --git a/config/general_config/featureset016.yml b/config/general_config/featureset016.yml
index 40448b668..0c011a671 100644
--- a/config/general_config/featureset016.yml
+++ b/config/general_config/featureset016.yml
@@ -9,8 +9,6 @@ overcloud_ipv6: false
 enable_opstools_repo: true
 
 containerized_overcloud: true
-# Undercloud registry mirror
-undercloud_docker_registry_mirror: "{{ lookup('env','NODEPOOL_DOCKER_REGISTRY_PROXY') }}"
 undercloud_generate_service_certificate: false
 
 ssl_overcloud: false
diff --git a/config/general_config/featureset017.yml b/config/general_config/featureset017.yml
index dd0939aae..39294f356 100644
--- a/config/general_config/featureset017.yml
+++ b/config/general_config/featureset017.yml
@@ -7,8 +7,6 @@ enable_pacemaker: false
 overcloud_ipv6: false
 
 containerized_overcloud: true
-# Undercloud registry mirror
-undercloud_docker_registry_mirror: "{{ lookup('env','NODEPOOL_DOCKER_REGISTRY_PROXY') }}"
 undercloud_generate_service_certificate: false
 
 ssl_overcloud: false
diff --git a/config/general_config/featureset018.yml b/config/general_config/featureset018.yml
index 2e806bd5a..9c55a9f68 100644
--- a/config/general_config/featureset018.yml
+++ b/config/general_config/featureset018.yml
@@ -7,8 +7,6 @@ enable_pacemaker: false
 overcloud_ipv6: false
 
 containerized_overcloud: true
-# Undercloud registry mirror
-undercloud_docker_registry_mirror: "{{ lookup('env','NODEPOOL_DOCKER_REGISTRY_PROXY') }}"
 undercloud_generate_service_certificate: false
 
 ssl_overcloud: false
diff --git a/config/general_config/featureset019.yml b/config/general_config/featureset019.yml
index df6976ecf..28608f38d 100644
--- a/config/general_config/featureset019.yml
+++ b/config/general_config/featureset019.yml
@@ -7,8 +7,6 @@ enable_pacemaker: false
 overcloud_ipv6: false
 
 containerized_overcloud: true
-# Undercloud registry mirror
-undercloud_docker_registry_mirror: "{{ lookup('env','NODEPOOL_DOCKER_REGISTRY_PROXY') }}"
 undercloud_generate_service_certificate: false
 
 ssl_overcloud: false
diff --git a/config/general_config/featureset022.yml b/config/general_config/featureset022.yml
index acd4ebca2..b296b9c20 100644
--- a/config/general_config/featureset022.yml
+++ b/config/general_config/featureset022.yml
@@ -3,8 +3,6 @@ containerized_overcloud: true
 # Workaround for limited disk space on undercloud
 # https://bugs.launchpad.net/tripleo/+bug/1694709
 delete_docker_cache: true
-# Undercloud registry mirror
-undercloud_docker_registry_mirror: "{{ lookup('env','NODEPOOL_DOCKER_REGISTRY_PROXY') }}"
 # TripleO settings
 ssl_overcloud: false
 undercloud_generate_service_certificate: true
diff --git a/config/general_config/featureset026.yml b/config/general_config/featureset026.yml
index 93908c388..93474015a 100644
--- a/config/general_config/featureset026.yml
+++ b/config/general_config/featureset026.yml
@@ -5,8 +5,6 @@ network_isolation: false
 enable_pacemaker: false
 overcloud_ipv6: false
 containerized_overcloud: true
-# Undercloud registry mirror
-undercloud_docker_registry_mirror: "{{ lookup('env','NODEPOOL_DOCKER_REGISTRY_PROXY') }}"
 # This enables TLS for the undercloud which will also make haproxy bind to the
 # configured public-vip and admin-vip.
 undercloud_generate_service_certificate: false