Remove Block Storage API v2 support

The Block Storage API v2 was deprecated in Pike by change
I913c44799cddc37c3342729ec0ef34068db5b2d4 and is (finally)
being removed in Xena [0].  So remove v2 support from devstack.

[0] https://wiki.openstack.org/wiki/CinderXenaPTGSummary#Removing_the_Block_Storage_API_v2

Depends-on: https://review.opendev.org/c/openstack/devstack/+/792048
Change-Id: I856d78648d28ac4cad0fb212bef1ae6ad32fca90
diff --git a/lib/cinder b/lib/cinder
index cfa3693..dab2aea 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -376,12 +376,6 @@
                 "$REGION_NAME" \
                 "$CINDER_SERVICE_PROTOCOL://$CINDER_SERVICE_HOST:$CINDER_SERVICE_PORT/v3/\$(project_id)s"
 
-            get_or_create_service "cinderv2" "volumev2" "Cinder Volume Service V2"
-            get_or_create_endpoint \
-                "volumev2" \
-                "$REGION_NAME" \
-                "$CINDER_SERVICE_PROTOCOL://$CINDER_SERVICE_HOST:$CINDER_SERVICE_PORT/v2/\$(project_id)s"
-
             get_or_create_service "cinderv3" "volumev3" "Cinder Volume Service V3"
             get_or_create_endpoint \
                 "volumev3" \
@@ -393,12 +387,6 @@
                 "$REGION_NAME" \
                 "$CINDER_SERVICE_PROTOCOL://$CINDER_SERVICE_HOST/volume/v3/\$(project_id)s"
 
-            get_or_create_service "cinderv2" "volumev2" "Cinder Volume Service V2"
-            get_or_create_endpoint \
-                "volumev2" \
-                "$REGION_NAME" \
-                "$CINDER_SERVICE_PROTOCOL://$CINDER_SERVICE_HOST/volume/v2/\$(project_id)s"
-
             get_or_create_service "cinderv3" "volumev3" "Cinder Volume Service V3"
             get_or_create_endpoint \
                 "volumev3" \
diff --git a/lib/tempest b/lib/tempest
index 29a6229..d835c68 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -459,13 +459,6 @@
     iniset $TEMPEST_CONFIG validation network_for_ssh $TEMPEST_SSH_NETWORK_NAME
 
     # Volume
-    # Set the service catalog entry for Tempest to run on. Typically
-    # used to try different Volume API version targets. The tempest
-    # default it to 'volumev3'(v3 APIs endpoint) , so only set this
-    # if you want to change it.
-    if [[ -n "$TEMPEST_VOLUME_TYPE" ]]; then
-        iniset $TEMPEST_CONFIG volume catalog_type $TEMPEST_VOLUME_TYPE
-    fi
     # Only turn on TEMPEST_VOLUME_MANAGE_SNAPSHOT by default for "lvm" backends
     if [[ "$CINDER_ENABLED_BACKENDS" == *"lvm"* ]]; then
         TEMPEST_VOLUME_MANAGE_SNAPSHOT=${TEMPEST_VOLUME_MANAGE_SNAPSHOT:-True}
@@ -489,12 +482,6 @@
     iniset $TEMPEST_CONFIG volume-feature-enabled volume_revert $(trueorfalse False TEMPEST_VOLUME_REVERT_TO_SNAPSHOT)
     local tempest_volume_min_microversion=${TEMPEST_VOLUME_MIN_MICROVERSION:-None}
     local tempest_volume_max_microversion=${TEMPEST_VOLUME_MAX_MICROVERSION:-"latest"}
-    # Reset microversions to None where v2 is running which does not support microversion.
-    # Both "None" means no microversion testing.
-    if [[ "$TEMPEST_VOLUME_TYPE" == "volumev2" ]]; then
-        tempest_volume_min_microversion=None
-        tempest_volume_max_microversion=None
-    fi
     if [ "$tempest_volume_min_microversion" == "None" ]; then
         inicomment $TEMPEST_CONFIG volume min_microversion
     else