Remove GLANCE_V1_ENABLED option

This option sets enable_v1_api in glance-api.conf, a setting that
was removed by change Ia086230cc8c92f7b7dfd5b001923110d5bc55d4d
in July 2018, so remove the devstack option from lib/glance.

It occurs in two other places:

This option is used in lib/cinder to set an option that was removed
from Cinder by change Ice379db9ae83420bacf9e96e242c7515930eae86 in
Queens, so remove the related code.

When this option is False, it is used in lib/tempest to set
[image-feature-enabled]/api_v1 to False in the tempest config file.
However, the default value of ths setting has been False since
change Iab3a209c744375bf2618afc00a3f7731b62f557e in Sept 2018,
so remove the related code.

Change-Id: I4b18a0a388ed7e7a392fabeac613778e0d23dee7

lib/cinder

@@ -311,10 +311,6 @@ function configure_cinder {
         iniset $CINDER_CONF DEFAULT glance_ca_certificates_file $SSL_BUNDLE_FILE
     fi
 
-    if [ "$GLANCE_V1_ENABLED" != "True" ]; then
-        iniset $CINDER_CONF DEFAULT glance_api_version 2
-    fi
-
     # Set nova credentials (used for os-assisted-snapshots)
     configure_keystone_authtoken_middleware $CINDER_CONF nova nova
     iniset $CINDER_CONF nova region_name "$REGION_NAME"

lib/glance

@@ -73,7 +73,6 @@ GLANCE_CACHE_CONF=$GLANCE_CONF_DIR/glance-cache.conf
 GLANCE_SCHEMA_JSON=$GLANCE_CONF_DIR/schema-image.json
 GLANCE_SWIFT_STORE_CONF=$GLANCE_CONF_DIR/glance-swift-store.conf
 GLANCE_IMAGE_IMPORT_CONF=$GLANCE_CONF_DIR/glance-image-import.conf
-GLANCE_V1_ENABLED=${GLANCE_V1_ENABLED:-False}
 
 if is_service_enabled tls-proxy; then
     GLANCE_SERVICE_PROTOCOL="https"
@@ -152,12 +151,6 @@ function configure_glance {
         iniset $GLANCE_API_CONF DEFAULT disk_formats "ami,ari,aki,vhd,vmdk,raw,qcow2,vdi,iso,ploop"
     fi
 
-    # NOTE(flaper87): To uncomment as soon as all services consuming Glance are
-    # able to consume V2 entirely.
-    if [ "$GLANCE_V1_ENABLED" != "True" ]; then
-        iniset $GLANCE_API_CONF DEFAULT enable_v1_api False
-    fi
-
     # Glance multiple store Store specific configs
     if [[ "$GLANCE_ENABLE_MULTIPLE_STORES" == "True" ]]; then
         iniset $GLANCE_API_CONF glance_store default_backend $GLANCE_DEFAULT_BACKEND

lib/tempest

@@ -346,11 +346,6 @@ function configure_tempest {
         iniset $TEMPEST_CONFIG image disk_formats "ami,ari,aki,vhd,raw,iso"
     fi
 
-    # Image Features
-    if [ "$GLANCE_V1_ENABLED" != "True" ]; then
-        iniset $TEMPEST_CONFIG image-feature-enabled api_v1 False
-    fi
-
     # Compute
     iniset $TEMPEST_CONFIG compute image_ref $image_uuid
     iniset $TEMPEST_CONFIG compute image_ref_alt $image_uuid_alt