Remove copilot request feature flag from audit workflow source

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

Author: Copilot

workflows/copilot-token-audit.md

@@ -77,8 +77,6 @@ steps:
         echo '{"runs":[],"summary":{}}' > /tmp/gh-aw/token-audit/copilot-logs.json
       fi
 timeout-minutes: 25
-features:
-  copilot-requests: true
 ---
 
 # Daily Copilot Token Usage Audit