修改判题数据库

problem/migrations/0007_remove_problem_last_update_time.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('problem', '0006_merge'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='problem',
+            name='last_update_time',
+        ),
+    ]