[r3dbars]

Addresses SPEECH-B-3. Remove the unused ParakeetEngine.modelFilesAvailableLocally property and its variant-query method. The only tracked reference to the method was the property itself; no caller uses either entry point.

This removes exactly 20 lines from ParakeetEngine.swift, matching the corresponding unmerged broad #2336 extraction. The rest of the file is byte-identical to main. Active model-cache state, readiness, model initialization, download, graph construction, device routing and recording paths are unchanged. With AirPods as default input, this cleanup adds no engine or input-node access and changes no routing policy.

Validation at 4e513cf917c8e79713ff268e772ba1a2c9f2da59:

• Independent full diff, original file, callers/method-value/selector/export and actual model/initialization review: Infra GREEN; root GREEN. These are internal Swift members, with no Objective-C export.
• No new test mirrors unreachable accessors. No engine, model, native capture or user preference store was instantiated for behavioral testing.
• Guarded bash check.sh: 17 PASS, including actual app compilation, strict concurrency census and source pins; unfiltered fast suite deliberately refused (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 speed SKIP because Transcripted is already running; no app quit or launch. Its hardware advisory remains unknown.
• Full QA bench refused at its outer invocation (exit 3), not run. Physical microphone, model download and Bluetooth behavior are not claimed verified.

This is a draft proposal, 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 establish native or model behavior.