Fix rich print error

robotB.py

 from anpl.synthesizer import raw_query, msg
 from utils import sys_str, system_info, multiline_input, select_task, set_openai_key, rich_dumps
 from rich.prompt import IntPrompt, Confirm, Prompt
-from rich import print
 from anpl.sandbox import import_module_from_string
 import numpy as np
 import time
@@ -9,7 +8,7 @@ import time
 history = []
 def print_msg(message):
     role, text = message["role"], message["content"]    
-    print(f"[blue]{role}[/blue]:")
+    print(f"{role}:")
     print(text)
 
 def print_history():