Revert "Fleetify nova conductor for N cells"

This reverts commit f63aa021cf996b500b6a570c0114c490bb57461a.

Change-Id: I541abe7311e5721d79e300fcb2a0b8ffdcd3c015
Related-Bug: #1700364
diff --git a/stack.sh b/stack.sh
index 5148ae1..6793d45 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1268,9 +1268,7 @@
 # Unable to use LUKS passphrase that is exactly 16 bytes long
 # https://bugzilla.redhat.com/show_bug.cgi?id=1447297
 if is_service_enabled nova; then
-    key=$(generate_hex_string 36)
-    iniset $NOVA_CONF key_manager fixed_key "$key"
-    iniset $NOVA_CPU_CONF key_manager fixed_key "$key"
+    iniset $NOVA_CONF key_manager fixed_key $(generate_hex_string 36)
 fi
 
 # Launch the nova-api and wait for it to answer before continuing