updated variables scope

defaults/main.yml

diff --git a/defaults/main.yml b/defaults/main.yml
index 1bae9e4..f866b6a 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -22,10 +22,6 @@
 # Default apigee installation home
 apigee_installation_home: /opt/apigee
 
-# Postgres credentials
-pg_user: '{{ opdk_user_name }}'
-pg_pass: '{{ opdk_user_pass }}'
-
 # Apigee service command for 4.16.xx
 apigee_service: '{{ apigee_installation_home }}/apigee-service/bin/apigee-service'