[PM-30483] Remove feature flagged logic for passkey unlock

[eligrubb]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-30483

📔 Objective

Now that passkey unlock has been released, this change, along with server PR#7318, removes the logic related to the passkey unlock feature flag pm-2035-passkey-unlock. The feature flag itself will be removed in a future ticket: https://bitwarden.atlassian.net/browse/PM-30484

📸 Screenshots

[github-actions]

Overall Assessment: APPROVE

Clean removal of the pm-2035-passkey-unlock feature flag (FeatureFlag.PasskeyUnlock). The PR removes the flag enum entry and its default value, strips the ConfigService and KeyService dependencies that were only needed for the flag check, and updates all three DI registration sites (browser, desktop, web) so the deps arrays match the updated constructor signature. No remaining references to the removed flag were found in the codebase.

Code Review Details

No findings. All changes are consistent and correctly applied.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.49%. Comparing base (e6e8213) to head (4c31355).
⚠️ Report is 286 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #19798   +/-   ##
=======================================
  Coverage   46.49%   46.49%           
=======================================
  Files        3850     3850           
  Lines      114912   114905    -7     
  Branches    17508    17507    -1     
=======================================
- Hits        53423    53422    -1     
+ Misses      59056    59050    -6     
  Partials     2433     2433           

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[github-actions]

Checkmarx One – Scan Summary & Details – 418ec95a-bf46-4ef7-93ac-68311a2b485b

Great job! No new security vulnerabilities introduced in this pull request

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[djsmith85]

Changes are looking good. Approving for platform