feat: migration to drop expiry_date column

lms/djangoapps/verify_student/migrations/0014_remove_softwaresecurephotoverification_expiry_date.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2.20 on 2021-05-17 14:11
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('verify_student', '0013_add_expiration_date_field'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='softwaresecurephotoverification',
+            name='expiry_date',
+        ),
+    ]