Drop auto-include of default comiss. script

 * Iterfaces script always be connected, if any another
   script has been passed via reclass

Change-Id: Ieb0fe458053f1a165557471fa2af22c2c580b1a9
Prod-related: PROD-20569 (PROD:20569)
diff --git a/maas/region.sls b/maas/region.sls
index 06d1970..e18048e 100644
--- a/maas/region.sls
+++ b/maas/region.sls
@@ -272,15 +272,6 @@
   - require:
     - pkg: maas_region_packages
 
-/etc/maas/files/commisioning_scripts/00-maas-05-simplify-network-interfaces:
-  file.managed:
-  - source: salt://maas/files/commisioning_scripts/00-maas-05-simplify-network-interfaces
-  - mode: 755
-  - user: root
-  - group: root
-  - require:
-    - file: /etc/maas/files/commisioning_scripts/
-
 maas_commissioning_scripts:
   module.run:
   - name: maas.process_commissioning_scripts