Erase the pre-submission after confirmation

app.py

@@ -187,6 +187,10 @@ def submit_results(*inputs):
     leaderboard_server.save_model_submission(inputs["submission_file"], metadata)
     gr.Info('Submission successful!')
     
+    # erase pre-submit
+    submission_id = metadata["submission_id"]
+    leaderboard_server.pre_submit.pop(submission_id)
+    
     with leaderboard_server.var_lock.ro:
         leaderboard = gr.update(
             value=leaderboard_server.get_leaderboard(category=leaderboard_server.TASKS_CATEGORY_OVERALL),