Update graders.py

graders.py

@@ -3,7 +3,7 @@ graders.py — Email Sorting OpenEnv
 3 grader tasks: easy, medium, hard. Scores 0.0–1.0.
 """
 
-from env import EmailSortingEnv, LABEL_TO_INT
+from env import EMAILS
 
 # ============================================
 # TASK 1 — EASY: Obvious spam detection
@@ -135,4 +135,4 @@ if __name__ == "__main__":
     results = run_all_graders()
     for r in results["tasks"]:
         print(f"Task: {r['task']:8s} | Score: {r['score']} | {r['correct']}/{r['total']} correct")
-    print(f"\nAverage Score: {results['average_score']}")
+    print(f"\nAverage Score: {results['average_score']}")