Remove unused allow_auth_from_lb parameter for content_data_api::db
Remove unused allow_auth_from_lb parameter for content_data_api::db

This is unused, and is only relevant when you're using PgBouncer,
which the content_data_api is not. This was added on mass when
pgbouncer was introduced, and copied from the Content Performance
Manager configuration.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet