Fix MCP example in readme (#6919)

README.md

@@ -59,8 +59,6 @@ Create a web browsing assistant agent that uses the Playwright MCP server.
 # First run `npm install -g @playwright/mcp@latest` to install the MCP server.
 import asyncio
 from autogen_agentchat.agents import AssistantAgent
-from autogen_agentchat.teams import RoundRobinGroupChat
-from autogen_agentchat.conditions import TextMessageTermination
 from autogen_agentchat.ui import Console
 from autogen_ext.models.openai import OpenAIChatCompletionClient
 from autogen_ext.tools.mcp import McpWorkbench, StdioServerParams
@@ -83,11 +81,7 @@ async def main() -> None:
             model_client_stream=True,
             max_tool_iterations=10,
         )
-        team = RoundRobinGroupChat(
-            [agent],
-            termination_condition=TextMessageTermination(source="web_browsing_assistant"),
-        )
-        await Console(team.run_stream(task="Find out how many contributors for the microsoft/autogen repository"))
+        await Console(agent.run_stream(task="Find out how many contributors for the microsoft/autogen repository"))
 
 
 asyncio.run(main())