Revert "Setup cellsv2 for Nova"

This reverts commit b1a4f34bfc6adb9ab4577520601c44e8ccff277d, which
breaks Ironic's jobs. For example:
http://logs.openstack.org/90/355390/1/check/gate-tempest-dsvm-ironic-ipa-wholedisk-agent_ssh-tinyipa/b9e264a/logs/devstacklog.txt.gz#_2016-08-15_17_31_13_358

Change-Id: Iafc579f73fe4a97056944872e2f2c8cd1a62c21c
diff --git a/lib/nova b/lib/nova
index 8ac8200..1369c40 100644
--- a/lib/nova
+++ b/lib/nova
@@ -936,11 +936,6 @@
     fi
 }
 
-# create_cell(): Group the available hosts into a cell
-function create_cell {
-    nova-manage cell_v2 simple_cell_setup --transport-url $(get_transport_url)
-}
-
 # Restore xtrace
 $_XTRACE_LIB_NOVA
 
diff --git a/stack.sh b/stack.sh
index b1903e7..823b63b 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1257,7 +1257,6 @@
     echo_summary "Starting Nova"
     start_nova
     create_flavors
-    create_cell
 fi
 if is_service_enabled cinder; then
     echo_summary "Starting Cinder"