gapfill G1: remove 5 ruff F401 unused imports (3 unused os in production files, 2 in tests); no assert lines changed, ruff all cloud now 0

cloud/tests/test_code_search_ext.py

@@ -13,14 +13,12 @@ import unittest
 from pathlib import Path
 
 try:
-    from cloud import websearch as _ws
     from cloud.websearch import (
         CODE_SEARCH_DOMAINS, WebSearchError, _is_code_domain,
         _normalize_allowed_hosts, search)
     from cloud.websearch_mcp import handle_request
 except ImportError:
     sys.path.insert(0, str(Path(__file__).resolve().parents[2]))
-    from cloud import websearch as _ws
     from cloud.websearch import (
         CODE_SEARCH_DOMAINS, WebSearchError, _is_code_domain,
         _normalize_allowed_hosts, search)