todo: mark V1 worker deprecation complete

TODO.md

@@ -51,13 +51,11 @@ Optimize only if memory becomes a constraint.
 
 ## Deprecation
 
-### [ ] Remove V1 worker protocol
+### [x] Remove V1 worker protocol
 
-- V2 workers (URL-driven) are the standard; no V1 workers remain active
+Completed. Removed `--worker` flag, `worker_main()`, `claim_work()`,
-- Remove `--worker` flag and V1 code path in ppf.py
+`submit_results()`, `/api/work`, `/api/results`, and related config
-- Remove `/api/claim`, `/api/submit` V1 endpoints in httpd.py
+options. V2 (`--worker-v2`) is the only worker protocol.
-- Remove V1 heartbeat/registration handling
-- Clean up any V1-specific state tracking in proxywatchd.py
 
 ---