Revert AgentMail third-party MCP plugin - #212

Bugbot Analysis Progress (1m 0s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (57s)
✅ Posted analysis results (0s)

Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_9fdf3218-34f7-41e4-9b63-7c0fa1dfbfcc