Clean up code comments and docstrings (#318)

Signed-off-by: rany <rany2@riseup.net>

src/edge_tts/util.py

@@ -1,6 +1,4 @@
-"""
-Main package.
-"""
+"""Utility functions for the command line interface. Used by the main module."""
 
 import argparse
 import asyncio