remove database_engine from config

Change-Id: I0e926dc37c1dfc598140f40286b06d7f3097d276
diff --git a/maas/files/regiond.conf b/maas/files/regiond.conf
index 0a652ef..8c9e8df 100644
--- a/maas/files/regiond.conf
+++ b/maas/files/regiond.conf
@@ -1,10 +1,5 @@
 {%- from "maas/map.jinja" import region with context %}
 
-{% if region.database.engine == "postgresql" %}
-database_engine: 
-{% else %} 
-database_engine:
-{% endif %} 
 database_host: {{ region.database.host }}
 database_name: {{ region.database.name }}
 database_pass: {{ region.database.password }}