Remove unused lo_indices variable to pass strict ruff linter

Author: TasfinMahmud

evaluate_baselines.py

@@ -62,7 +62,6 @@ def get_matched_coverage_gap(score, correct, target_n):
         # Sort descending by score
         sorted_indices = np.argsort(score)[::-1]
         hi_indices = sorted_indices[:target_n]
-        lo_indices = sorted_indices[target_n:]
 
         hi_mask = np.zeros(len(score), dtype=bool)
         hi_mask[hi_indices] = True