[r3dbars]

Addresses MEETING-A-3. Remove the unused private two-argument suppressRuntimePrompts(for:until:) forwarder. All six real calls pass an explicit reason to the unchanged three-argument implementation.

Only four lines in MeetingPromptDetector+Backoff.swift are removed. The entire file is otherwise byte-identical to main. The unused snooze wrapper is a separate extraction in #2516; this branch leaves it intact. This is the corresponding issue-sized cleanup from unmerged broad draft #2336.

Validation at 8e460a132c58552bd976648125db9041e4e275aa:

• Independent full diff, whole backoff implementation, all caller/method-value/selector references and detector export review: GREEN. Private Swift method, no Objective-C export or tracked two-argument caller.
• No new test mirrors an unreachable forwarder. Actual Record / dismiss / remind wiring and active suppression logic are unchanged.
• Guarded bash check.sh: 16 PASS, including forced dependencies, actual app compilation and concurrency census. Full fast and integration suites were deliberately blocked (each exit 3); overall canonical proof remains FAIL. Exact-head clean/stable raw JSON archived before verification.
• Standalone preflight PASS. verify-change.sh exits 0 with meetings SKIP because Transcripted is already running. The owned app builds; no app is quit or launched. Its generic live-hardware advisory remains unknown.
• Full QA bench refused at its outer invocation (exit 3), not run. Native detection, capture, owner preferences and mixed prompt suites were not exercised.

No prompt policy or protected user-facing flow changes. This draft is not a landed fix.

• Exact-head hosted metadata: Repo Hygiene completed successfully, attempt 1. Swift CI was queued and Concurrency Census in progress at this check. This does not clear the local guard gaps or establish native behavior.