Update app.py

app.py

@@ -8,7 +8,7 @@ from audio_processing import async_text_to_speech, text_to_speech
 from content_generation import create_content, CONTENT_TYPES
 from video_processing import create_video_func
 from moviepy.editor import AudioFileClip, CompositeAudioClip
-from utils import (combine_videos, get_pexels_image, split_audio, get_bgm_file)
+from utils import (combine_videos, get_pexels_image, get_bgm_file)
 from video_processing import create_video
 
 # Danh sách giọng đọc