fix: remove unused numpy/scipy imports, delete duplicate zip file

- quality_effectiveness_monitor.py: removed numpy/scipy (imported but never used, violates stdlib-only rule)
- epic-design.zip: removed binary duplicate of skill folder

Author: Leo

engineering-team/epic-design.zip

@@ -27,8 +27,7 @@
 from typing import List, Dict, Optional, Tuple
 from datetime import datetime, timedelta
 from statistics import mean, stdev, median
-import numpy as np
-from scipy import stats
+
 
 
 @dataclass