disabling `using_<source_table>` doesn't remove table from sources

[ericalouie]

Hi team!

We added this package to our dbt project and disabled user_tags as we don't have this enabled on our account and this table doesn't exist in our warehouse (see configuration below)

However, it looks like in the src_zendesk.yml file, the user_tag table is still being counted when we run a dbt source snapshot-freshness command.

We were able to solve this issue by explicitly disabling user_tags in a source configuration block (see image below), but figured I'd bring this to your attention :)

[kristin-bagnall]

Hey @ericalouie, This is super interesting, thanks for sharing!

I'm thinking we should just incorporate this change in our package's source config block so it disables the freshness tests for users automatically.