chore: Remove unused code from standoff responder (DEV-3264)

[BalduinLandolt]

Pull Request Checklist

Task Description/Number

Issue Number: DEV-

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[linear]

DEV-3264 Remove unnecessary standoff responder methods

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 12.92%. Comparing base (eac5751) to head (c8a979a).
Report is 111 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3085      +/-   ##
==========================================
+ Coverage   11.74%   12.92%   +1.18%     
==========================================
  Files         246      260      +14     
  Lines       22907    22337     -570     
==========================================
+ Hits         2690     2887     +197     
+ Misses      20217    19450     -767     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[siers]

This one's a bit tougher to sift through, but I managed it!