chore(extract): drop now-dead from .ids import make_id import

The extractor-split port (b3ab221) moved `_make_id` (the only user of
`make_id`) into graphify/extractors/base.py, leaving the top-level
`from .ids import make_id` in extract.py unused. Remove it. Surfaced by
`ruff --select F` (F401); harmless at runtime and not in the enforced lint
set, but it is dead code from the move. extract.py F-issue count back to the
pre-port baseline; module imports and the zig/elixir/razor/blade tests pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

graphify/extract.py

@@ -11,7 +11,6 @@ from pathlib import Path
 from typing import Any, Callable
 
 from .cache import load_cached, save_cached
-from .ids import make_id
 from .mcp_ingest import extract_mcp_config, is_mcp_config_path
 from .manifest_ingest import extract_package_manifest, is_package_manifest_path