diff --git a/files/rpms/n-cpu b/files/rpms/n-cpu
index 5683862ee0..3d50f3a062 100644
--- a/files/rpms/n-cpu
+++ b/files/rpms/n-cpu
@@ -1,10 +1,9 @@
 cryptsetup
 dosfstools
-genisoimage # not:rhel9,rhel10
 iscsi-initiator-utils
 libosinfo
 lvm2
 sg3_utils
 # Stuff for diablo volumes
 sysfsutils
-xorriso # not:rhel8
+xorriso
diff --git a/files/rpms/nova b/files/rpms/nova
index 3ed2943c1d..c323224279 100644
--- a/files/rpms/nova
+++ b/files/rpms/nova
@@ -1,7 +1,7 @@
 conntrack-tools
 curl
 ebtables
-genisoimage # not:rhel9,rhel10 required for config_drive
+genisoimage
 iptables
 iputils
 kernel-modules # not:openEuler-22.03
@@ -11,4 +11,3 @@ polkit
 rabbitmq-server # NOPRIME
 sqlite
 sudo
-xorriso # not:rhel8
diff --git a/lib/neutron_plugins/ovn_agent b/lib/neutron_plugins/ovn_agent
index b128fde2b6..e346f4d1cd 100644
--- a/lib/neutron_plugins/ovn_agent
+++ b/lib/neutron_plugins/ovn_agent
@@ -407,9 +407,6 @@ function install_ovn {
         sudo mkdir -p $OVS_PREFIX/var/log/ovn
         sudo chown $(whoami) $OVS_PREFIX/var/log/ovn
     else
-        # Load fixup_ovn_centos
-        source ${TOP_DIR}/tools/fixup_stuff.sh
-        fixup_ovn_centos
         install_package $(get_packages openvswitch)
         install_package $(get_packages ovn)
     fi
diff --git a/stack.sh b/stack.sh
index c8be7fa216..67c7a74de9 100755
--- a/stack.sh
+++ b/stack.sh
@@ -366,36 +366,7 @@ fi
 # to speed things up
 SKIP_EPEL_INSTALL=$(trueorfalse False SKIP_EPEL_INSTALL)
 
-if [[ $DISTRO == "rhel8" ]]; then
-    # If we have /etc/ci/mirror_info.sh assume we're on a OpenStack CI
-    # node, where EPEL is installed (but disabled) and already
-    # pointing at our internal mirror
-    if [[ -f /etc/ci/mirror_info.sh ]]; then
-        SKIP_EPEL_INSTALL=True
-        sudo dnf config-manager --set-enabled epel
-    fi
-
-    # PowerTools repo provides libyaml-devel required by devstack itself and
-    # EPEL packages assume that the PowerTools repository is enable.
-    sudo dnf config-manager --set-enabled PowerTools
-
-    # CentOS 8.3 changed the repository name to lower case.
-    sudo dnf config-manager --set-enabled powertools
-
-    if [[ ${SKIP_EPEL_INSTALL} != True ]]; then
-        _install_epel
-    fi
-    # Along with EPEL, CentOS (and a-likes) require some packages only
-    # available in RDO repositories (e.g. OVS, or later versions of
-    # kvm) to run.
-    _install_rdo
-
-    # NOTE(cgoncalves): workaround RHBZ#1154272
-    # dnf fails for non-privileged users when expired_repos.json doesn't exist.
-    # RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1154272
-    # Patch: https://github.com/rpm-software-management/dnf/pull/1448
-    echo "[]" | sudo tee /var/cache/dnf/expired_repos.json
-elif [[ $DISTRO == "rhel9" ]]; then
+if [[ $DISTRO == "rhel9" ]]; then
     # for CentOS Stream 9 repository
     sudo dnf config-manager --set-enabled crb
     # for RHEL 9 repository
diff --git a/tools/fixup_stuff.sh b/tools/fixup_stuff.sh
index faea44f1e0..fbac5ad2f1 100755
--- a/tools/fixup_stuff.sh
+++ b/tools/fixup_stuff.sh
@@ -89,19 +89,6 @@ EOF
     if is_package_installed python3-setuptools; then
         sudo dnf reinstall -y python3-setuptools
     fi
-    # Workaround CentOS 8-stream iputils and systemd Bug
-    # https://bugzilla.redhat.com/show_bug.cgi?id=2037807
-    if [[ $os_VENDOR == "CentOSStream" && $os_RELEASE -eq 8 ]]; then
-        sudo sysctl -w net.ipv4.ping_group_range='0 2147483647'
-    fi
-}
-
-function fixup_ovn_centos {
-    if [[ $os_VENDOR != "CentOS" ]]; then
-        return
-    fi
-    # OVN packages are part of this release for CentOS
-    yum_install centos-release-openstack-victoria
 }
 
 function fixup_ubuntu {