fix(ci): remove 2 unused imports from pii-daemon (ruff check F401)

pii-daemon.py imported threading and time but never used them after an
earlier refactor. ruff check flagged these with F401 and that's what CI
Lint was rejecting (format was fine after the previous commit; lint was
the remaining gate).

Auto-fixed via ruff check --fix.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: cdeust

.claude/memory/pii-daemon.py

@@ -54,8 +54,6 @@
 import math
 import socket
 import signal
-import threading
-import time
 import pathlib
 
 # ── constants ─────────────────────────────────────────────────────────────────