Remove unused network config from baremetal path

Drop BAREMETAL_GATEWAY from config_example.sh — nothing in dev-scripts
reads it; nodes get gateway from DHCP.

Remove registry /etc/hosts + login block from 02_configure_host.sh
baremetal path — PROVISIONING_HOST_EXTERNAL_IP resolves to the wrong
IP (computed from node subnet, not provisioning host address), and the
baremetal flow uses CI_TOKEN for registry auth, not a local registry.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: fonta-rh

02_configure_host.sh

@@ -97,19 +97,6 @@ if [[ "${NODES_PLATFORM}" == "baremetal" ]]; then
 
     switch_to_internal_dns
 
-    sudo sed -i "/${LOCAL_REGISTRY_DNS_NAME}/d" /etc/hosts
-    echo "${PROVISIONING_HOST_EXTERNAL_IP} ${LOCAL_REGISTRY_DNS_NAME}" | sudo tee -a /etc/hosts
-
-    if use_registry "podman"; then
-        rm -f "${REGISTRY_CREDS}"
-        sudo podman login --authfile "${REGISTRY_CREDS}" \
-            -u "${REGISTRY_USER}" -p "${REGISTRY_PASS}" \
-            "${LOCAL_REGISTRY_DNS_NAME}":"${LOCAL_REGISTRY_PORT}"
-    elif ! use_registry "quay"; then
-        echo '{}' | sudo dd of="${REGISTRY_CREDS}"
-    fi
-    sudo chown "$USER":"$USER" "${REGISTRY_CREDS}"
-
     exit 0
 fi
 

config_example.sh

@@ -503,11 +503,6 @@ set -x
 #
 #export BAREMETAL_INGRESS_VIP="10.1.155.101"
 
-# BAREMETAL_GATEWAY -
-# Default gateway for baremetal nodes.
-#
-#export BAREMETAL_GATEWAY="10.1.155.1"
-
 # BAREMETAL_ISO_SERVER -
 # Full HTTP URL where the agent ISO is staged for Redfish VirtualMedia boot.
 # This is the only baremetal var NOT auto-generated by adoption — the user