Remove 'create_node' from driver generator and '*.sct' files

It wasn't in working condition nor was it being used in any drivers

site_ansto/instrument/bilby/config/motors/shutters.sct

@@ -3,7 +3,6 @@
 # vim: ts=8 sts=2 sw=2 expandtab autoindent smartindent nocindent
 #
 driver shutters = {
-  usecreatenode = false
   vendor = galil; device = mc4; protocol = dmc2280;
   class = instrument
   simulation_group = motor_simulation