Temporarily remove Weave Router from the leaderboard

Removed from:
- src/data/routerMetrics/leaderboard.json (JSON, entry deleted)
- src/data/routerMetrics/category_scores.json (JSON, key deleted)
- src/data/routers.json (JSON, key deleted)
- src/data/routers.yaml (YAML, block commented out — restore instructions inline)

Kept:
- src/data/flip_labels/flip_labels_weave-router.json (orphan, harmless,
  trivial to re-reference if Weave is restored)

To re-add Weave: uncomment the YAML block and use the git history of this
commit to restore the matching JSON entries.

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

Author: yl231