chore: remove shared/mcp/gh-aw.md and use tools.agentic-workflows instead

Agent-Logs-Url: https://github.com/githubnext/agentic-ops/sessions/f67e81b8-f533-4e27-bf25-e46c5c033a59

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

workflows/copilot-token-audit.md

@@ -57,7 +57,6 @@ imports:
       description: "Historical daily Copilot token usage snapshots"
       max-patch-size: 51200
   - copilot-setup-steps.yml
-  - uses: shared/mcp/gh-aw.md
   - shared/python-dataviz.md
 features:
   copilot-requests: true