chore(aci): Actually delete WorkflowFireHistory.is_single_written (#103683)

Finalize the field removal.

Author: kcons

migrations_lockfile.txt

@@ -39,4 +39,4 @@ tempest: 0003_use_encrypted_char_field
 
 uptime: 0048_delete_uptime_status_columns
 
-workflow_engine: 0100_move_is_single_written_to_pending
+workflow_engine: 0101_remove_is_single_written_field

src/sentry/workflow_engine/migrations/0101_remove_is_single_written_field.py

@@ -0,0 +1,33 @@
+# Generated by Django 5.2.8 on 2025-11-19 19:25
+
+from sentry.new_migrations.migrations import CheckedMigration
+from sentry.new_migrations.monkey.fields import SafeRemoveField
+from sentry.new_migrations.monkey.state import DeletionAction
+
+
+class Migration(CheckedMigration):
+    # This flag is used to mark that a migration shouldn't be automatically run in production.
+    # This should only be used for operations where it's safe to run the migration after your
+    # code has deployed. So this should not be used for most operations that alter the schema
+    # of a table.
+    # Here are some things that make sense to mark as post deployment:
+    # - Large data migrations. Typically we want these to be run manually so that they can be
+    #   monitored and not block the deploy for a long period of time while they run.
+    # - Adding indexes to large tables. Since this can take a long time, we'd generally prefer to
+    #   run this outside deployments so that we don't block them. Note that while adding an index
+    #   is a schema change, it's completely safe to run the operation after the code has deployed.
+    # Once deployed, run these manually via: https://develop.sentry.dev/database-migrations/#migration-deployment
+
+    is_post_deployment = False
+
+    dependencies = [
+        ("workflow_engine", "0100_move_is_single_written_to_pending"),
+    ]
+
+    operations = [
+        SafeRemoveField(
+            model_name="workflowfirehistory",
+            name="is_single_written",
+            deletion_action=DeletionAction.DELETE,
+        ),
+    ]