remove unnecessary import

app.py

@@ -8,7 +8,6 @@ from smolagents import (
     CodeAgent, 
     LiteLLMModel, 
     PythonInterpreterTool,
-    DuckDuckGoSearchTool,
     VisitWebpageTool,
     GoogleSearchTool, 
     WikipediaSearchTool,
@@ -39,7 +38,7 @@ class BasicAgent:
                 GoogleSearchTool(provider="serper"),
                 WikipediaSearchTool(),
                 YoutubeTranscriptTool(),
-                SpeechToTextTool()
+                SpeechToTextTool(),
             ], 
             model=model,
             step_callbacks=[rate_limiter.increment_and_sleep_if_needed],