Remove RequiredAction model (#2078)

src/pretix/base/migrations/0188_delete_requiredaction.py

@@ -0,0 +1,16 @@
+# Generated by Django 3.2.2 on 2021-05-13 18:20
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0187_normalize_salutation'),
+    ]
+
+    operations = [
+        migrations.DeleteModel(
+            name='RequiredAction',
+        ),
+    ]