Drop unused monthly_auth_counts table (LG-12483)

[mitchellhenke]

🎫 Ticket

Link to the relevant ticket:
LG-12483

🛠 Summary of changes

We stopped using this table in #3634, and that PR created monthly_sp_auth_counts. That table was dropped in #7312. Along similar lines, this PR drops the monthly_auth_counts table.

[aduth]

Should we remove the model as well?

https://github.com/18F/identity-idp/blob/main/app/models/monthly_auth_count.rb

[mitchellhenke]

Should we remove the model as well?

https://github.com/18F/identity-idp/blob/main/app/models/monthly_auth_count.rb

Thanks for catching that. I made a note of it, but totally forgot.

[zachmargolis]

I think we need to remove the model in a PR before the table because we have our code set up to eager connect to tables? it's a benign error if it pops up during a deploy though

[mitchellhenke]

I think we need to remove the model in a PR before the table because we have our code set up to eager connect to tables? it's a benign error if it pops up during a deploy though

Do you have a link to that error happening in the past? I tested locally and in the sandbox and the deploy seems to work ok.

[zachmargolis]

I don't offhand