classifyPosition's return enum was discarded by its only production caller (rearm is the side effect that matters); the latch's tolerance/retry knobs were never tuned; _loadAdjacentEpisodes' result was unread by all three callers; countsAsApplied carried a subsumed disjunct and _syncMediaControlsAvailability a stale-generation guard with no suspension point before it; _SettingsView.audioSync/subtitleSync could never be current (both routes early-return into the sync bar); PerformanceStats.dvRpuOutputTooSmall/dvPlaybackReason and ContentStrip.chaptersLoaded were written but never read.