Drop deprecated SQL columns

ts/sql/migrations/68-drop-deprecated-columns.ts

@@ -0,0 +1,31 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { Database } from 'better-sqlite3';
+
+import type { LoggerType } from '../../types/Logging';
+
+export default function updateToSchemaVersion68(
+  currentVersion: number,
+  db: Database,
+  logger: LoggerType
+): void {
+  if (currentVersion >= 68) {
+    return;
+  }
+
+  db.transaction(() => {
+    db.exec(
+      `
+      ALTER TABLE messages
+        DROP COLUMN deprecatedSourceDevice;
+      ALTER TABLE unprocessed
+        DROP COLUMN deprecatedSourceDevice;
+      `
+    );
+
+    db.pragma('user_version = 68');
+  })();
+
+  logger.info('updateToSchemaVersion68: success!');
+}