Remove upgrade from non-ironic setup

Grenade should only upgrade, and shouldn't setup new services,
remove setup code for case inspector is missing during upgrade.

Also ironic doesn't support this anymore, related code was removed
Id7159aac8c8a343e3d20561cedc4722d87d3e776.

Change-Id: I867215574af7135103876d8004241761a5e2c683

devstack/upgrade/upgrade.sh

@@ -60,30 +60,6 @@ set -o xtrace
 
 initialize_database_backends
 
-function is_nova_migration {
-    # Deterine whether we're "upgrading" from another compute driver
-    # read localrc from the end, pick only first match
-    _ironic_old_driver=$( tac $BASE_DEVSTACK_DIR/localrc |grep -m 1 VIRT_DRIVER | awk -F '=' '{print $2}')
-    [ "$_ironic_old_driver" != "ironic" ]
-}
-
-# Duplicate all required devstack setup that is needed before starting
-# Inspector during a sideways upgrade, where we are migrating from an
-# devstack environment without Inspector.
-function init_inspector {
-    # We need to source credentials here but doing so in the gate will unset
-    # HOST_IP.
-    local tmp_host_ip=$HOST_IP
-    source $TARGET_DEVSTACK_DIR/openrc admin admin
-    HOST_IP=$tmp_host_ip
-    IRONIC_BAREMETAL_BASIC_OPS="True"
-    $TARGET_DEVSTACK_DIR/tools/install_prereqs.sh
-    recreate_database ironic_inspector utf8
-    $INSPECTOR_PLUGIN stack install
-    $INSPECTOR_PLUGIN stack post-config
-    $INSPECTOR_PLUGIN stack extra
-}
-
 function wait_for_keystone {
     if ! wait_for_service $SERVICE_TIMEOUT ${KEYSTONE_AUTH_URI}/v$IDENTITY_API_VERSION/; then
         die $LINENO "keystone did not start"
@@ -101,15 +77,6 @@ if [[ "$IRONIC_INSPECTOR_MANAGE_FIREWALL" == "True" ]]; then
     stack_install_service ironic-inspector-dhcp
 fi
 
-
-# FIXME(milan): using Ironic's detection; not sure whether it's needed
-# If we are sideways upgrading and migrating from a base deployed with
-# VIRT_DRIVER=fake, we need to run Inspector install, config and init
-# code from devstack.
-if is_nova_migration ; then
-    init_inspector
-fi
-
 $IRONIC_INSPECTOR_DBSYNC_BIN_FILE --config-file $IRONIC_INSPECTOR_CONF_FILE upgrade
 
 # calls upgrade inspector for specific release