chore: Remove deprecated code owner utilities and related tests

[ktyagiapphelix2u]

WARNING

The DEPR task list (#469) now clarifies what parts of this PR are unblocked and what is blocked. The blocked parts need to be removed for this to move forward.

Summary

• Deleted the code owner utility functions and mappings from utils.py, which were no longer in use.
• Removed the New Relic search script that was dependent on the code owner utilities.
• Cleared out all associated test files for the code owner functionality, including middleware and utility tests.
• This cleanup is part of the effort to streamline the monitoring module and remove unused code.

Ticket

https://2u-internal.atlassian.net/browse/BOMS-241

[robrap]

Some high-level feedback:

1. We need to determine whether we will add a deprecation warning before doing this removal.
2. We want to mark outdated ADRs as obsolete and add a new one to detail why, but ADRs shouldn't be removed.

[ktyagiapphelix2u]

• We need to determine whether we will add a deprecation warning before doing this removal.

@robrap I’m a bit unclear on this as well. From the original ticket https://2u-internal.atlassian.net/browse/BOMS-241, my understanding was that the deprecation warning should be added after the cleanup/removal work is completed.

Could you clarify what we need to determine before proceeding with the removal, and whether we’re expected to add the deprecation warning before the cleanup instead?

[robrap]

@robrap I’m a bit unclear on this as well. From the original ticket https://2u-internal.atlassian.net/browse/BOMS-241, my understanding was that the deprecation warning should be added after the cleanup/removal work is completed.

We can't have a deprecation warning for something that doesn't exist, so it needs to be added before the functionality is deleted. It is the first step, and it also read "possibly after edx-platform clean-up", which I'm not sure why I added, but meant that we could begin removing uses in edx-platform (not definitions from edx-django-utils).

[robrap]

[inform] The DEPR task list (#469) now clarifies what parts of this PR are unblocked and what is blocked. The blocked parts need to be removed for this to move forward.