removed external postgres from bom file

Author: akshatsinha007

charts/devtron-enterprise/devtron-bom.yaml

@@ -18,12 +18,6 @@ global:
   #     effect: "NoSchedule"
   # imagePullSecrets:
   #     - name: your-image-pull-secret
-  externalPostgres:
-    enabled: false
-    # Password for external database (ensure that username is postgres).
-    PG_PASSWORD: ""
-    # For external Database replace the PG_ADDR with the DNS endpoint of postgres.
-    PG_ADDR: ""
   dbConfig:
     PG_ADDR: postgresql-postgresql.devtroncd
     PG_PORT: "5432"