Clean up unnecessary exception imports

ref-test/app/admin/views.py

@@ -9,7 +9,6 @@ from ..tools.test import  answer_options, get_correct_answers
 from flask import abort, Blueprint, jsonify, render_template, request, send_file, session
 from flask.helpers import abort, flash, redirect, url_for
 from flask_login import current_user, login_required
-from sqlalchemy.exc import SQLAlchemyError
 
 from datetime import date, datetime, timedelta
 from json import loads