Remove settings and invoices internal endpoints

[rohitvinnakota-codecov]

Now that these endpoints have been migrated to GQL, remove unused internal endpoint code.

https://codecov.sentry.io/performance/summary/?environment=production&project=5215654&query=&referrer=performance-transaction-summary&statsPeriod=14d&transaction=%2Finternal%2F%7Bservice%7D%2F%7Bowner_username%7D%2Finvoices%2F&unselectedSeries=p100%28%29&unselectedSeries=avg%28%29

This closes codecov/engineering-team#1502

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. In 2022 this entity acquired Codecov and as result Sentry is going to need some rights from me in order to utilize my contributions in this PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

[codecov-qa]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.57%. Comparing base (2d7c004) to head (8a70385).

✅ All tests successful. No failed tests found.

@@            Coverage Diff             @@
##             main     #654      +/-   ##
==========================================
- Coverage   91.58%   91.57%   -0.02%     
==========================================
  Files         628      628              
  Lines       16705    16667      -38     
==========================================
- Hits        15300    15262      -38     
  Misses       1405     1405              

Flag	Coverage Δ
unit	91.57% <100.00%> (-0.02%)	⬇️
unit-latest-uploader	91.57% <100.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
api/internal/enterprise_urls.py	100.00% <100.00%> (ø)
api/internal/owner/views.py	98.96% <ø> (-0.12%)	⬇️
api/internal/self_hosted/serializers.py	100.00% <ø> (ø)
api/internal/self_hosted/views.py	100.00% <100.00%> (ø)
api/internal/urls.py	97.22% <ø> (-0.08%)	⬇️

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[codecov-notifications]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

[codecov-public-qa]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.57%. Comparing base (2d7c004) to head (8a70385).

✅ All tests successful. No failed tests found.

@@            Coverage Diff             @@
##             main     #654      +/-   ##
==========================================
- Coverage   91.58%   91.57%   -0.02%     
==========================================
  Files         628      628              
  Lines       16705    16667      -38     
==========================================
- Hits        15300    15262      -38     
  Misses       1405     1405              

Flag	Coverage Δ
unit	91.57% <100.00%> (-0.02%)	⬇️
unit-latest-uploader	91.57% <100.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
api/internal/enterprise_urls.py	100.00% <100.00%> (ø)
api/internal/owner/views.py	98.96% <ø> (-0.12%)	⬇️
api/internal/self_hosted/serializers.py	100.00% <ø> (ø)
api/internal/self_hosted/views.py	100.00% <100.00%> (ø)
api/internal/urls.py	97.22% <ø> (-0.08%)	⬇️

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.94%. Comparing base (2d7c004) to head (8a70385).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##               main       #654   +/-   ##
===========================================
  Coverage   95.94000   95.94000           
===========================================
  Files           806        806           
  Lines         18022      17984   -38     
===========================================
- Hits          17292      17254   -38     
  Misses          730        730           

Flag	Coverage Δ
unit	91.57% <100.00%> (-0.02%)	⬇️
unit-latest-uploader	91.57% <100.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

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[ajay-sentry]

lgtm! Confirmed on profiler that these endpoints aren't being called anymore