- Remove duplicate computeIssueContentHash from sqlite/hash.go - Remove FileUsed() from internal/config/config.go - Remove verifyIssueOpen() test helper from git_sync_test.go - Remove unimplemented SummarizeTier2 and all tier2 infrastructure from haiku.go Removes ~120 LOC of dead code identified by deadcode analyzer. Amp-Thread-ID: https://ampcode.com/threads/T-5f150c35-8d67-4dae-bb92-a7b5887d649d Co-authored-by: Amp <amp@ampcode.com>