revert: remove incorrect root path handler

esm/mcp_output/mcp_plugin/mcp_service.py

@@ -260,9 +260,4 @@ def create_app():
     Returns:
         FastMCP: MCP service instance.
     """
-    # Add root path handler for health check
-    @mcp.get("/")
-    async def root():
-        return {"status": "ok", "service": "Code2MCP-esm", "transport": "http"}
-    
     return mcp