Remove dead OAuth code

[claucambra]

Fixes #3692

[mgallien]

@claucambra can you fix the compilation issues ?

[github-actions]

⚠️ clang-tidy found issue(s) with the introduced code (1/1)

[claucambra]

@claucambra can you fix the compilation issues ?

Now fixed :)

No clang-tidy warnings found so I assume my comments were addressed

[codecov]

Codecov Report

Merging #6005 (6cf04d6) into master (9e74f5c) will increase coverage by 0.10%.
The diff coverage is 27.27%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6005      +/-   ##
==========================================
+ Coverage   60.23%   60.34%   +0.10%     
==========================================
  Files         145      145              
  Lines       18868    18793      -75     
==========================================
- Hits        11366    11340      -26     
+ Misses       7502     7453      -49     

Files Changed	Coverage Δ
src/libsync/creds/httpcredentials.h	25.00% <ø> (+5.00%)	⬆️
src/libsync/networkjobs.cpp	54.63% <0.00%> (+0.21%)	⬆️
src/libsync/networkjobs.h	4.16% <ø> (ø)
src/libsync/propagatedownload.cpp	66.85% <ø> (ø)
src/libsync/theme.cpp	19.35% <ø> (-0.91%)	⬇️
src/libsync/theme.h	60.00% <ø> (ø)
src/libsync/creds/httpcredentials.cpp	20.14% <42.85%> (+2.89%)	⬆️

... and 3 files with indirect coverage changes

[allexzander]

@claucambra

Compilation still fails:
continuous-integration/drone/pr — Build is failing

[mgallien]

@claucambra please fix the conflict ?

[claucambra]

@claucambra please fix the conflict ?

now fixed

[camilasan]

🧹

[nextcloud-desktop-bot]

AppImage file: nextcloud-PR-6005-6cf04d660b8ba7cf59c227826a0ecf718a0b0c16-x86_64.AppImage

To test this change/fix you can simply download above AppImage file and test it.

Please make sure to quit your existing Nextcloud app and backup your data.

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
3 Code Smells

14.3% Coverage
0.0% Duplication

Catch issues before they fail your Quality Gate with our IDE extension SonarLint

[claucambra]

/backport to stable-3.10

[backportbot-nextcloud]

The backport to stable-3.10 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable-3.10
git pull origin stable-3.10

# Create the new backport branch
git checkout -b fix/foo-stable-3.10

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable-3.10

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport