Refactor TranscriptionTextArea to remove unused imports and clean up …

…code formatting

src/audio/textual_transcription_textarea.py

@@ -14,10 +14,12 @@
 from notes.manager import NoteManager
 from simpler_whisper.whisper import set_log_callback, LogLevel
 
+
 def my_log_callback(level, message):
     # prevent debug messages from being printed
     pass
 
+
 class TranscriptionTextArea(TextArea):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)