Remove support for nova-volume

* nova-volume has been removed in Grizzly
* part of delete-nova-volume

Change-Id: Iba91d69950767823d77aaaa93243b0f476dbb04d
diff --git a/stack.sh b/stack.sh
index 40eab36..75e0244 100755
--- a/stack.sh
+++ b/stack.sh
@@ -93,7 +93,7 @@
 # ============
 
 # Remove services which were negated in ENABLED_SERVICES
-# using the "-" prefix (e.g., "-n-vol") instead of
+# using the "-" prefix (e.g., "-rabbit") instead of
 # calling disable_service().
 disable_negated_services
 
@@ -154,12 +154,6 @@
 fi
 unset rpc_backend_cnt
 
-# Make sure we only have one volume service enabled.
-if is_service_enabled cinder && is_service_enabled n-vol; then
-    echo "ERROR: n-vol and cinder must not be enabled at the same time"
-    exit 1
-fi
-
 # Set up logging level
 VERBOSE=$(trueorfalse True $VERBOSE)
 
@@ -310,7 +304,6 @@
 source $TOP_DIR/lib/glance
 source $TOP_DIR/lib/nova
 source $TOP_DIR/lib/cinder
-source $TOP_DIR/lib/n-vol
 source $TOP_DIR/lib/ceilometer
 source $TOP_DIR/lib/heat
 source $TOP_DIR/lib/quantum
@@ -1749,9 +1742,6 @@
 if is_service_enabled cinder; then
     echo_summary "Configuring Cinder"
     init_cinder
-elif is_service_enabled n-vol; then
-    echo_summary "Configuring Nova volumes"
-    init_nvol
 fi
 
 if is_service_enabled nova; then
@@ -1951,10 +1941,6 @@
     echo_summary "Starting Nova"
     start_nova
 fi
-if is_service_enabled n-vol; then
-    echo_summary "Starting Nova volumes"
-    start_nvol
-fi
 if is_service_enabled cinder; then
     echo_summary "Starting Cinder"
     start_cinder