Add file docstring, remove unneeded import

util/drawing.py

@@ -1,5 +1,9 @@
+"""
+    util/drawing.py
+
+    Utility functions for drawing data processing
+"""
 from datetime import datetime, timedelta
-from dateutil.relativedelta import relativedelta, MO, TU, WE, FR, SA
 
 
 def get_next_draw_date(game: str | None, from_date: str | None = None) -> str | None: