Cleanup the removal of the now-unused isBlocked fields. (#8663)

Author: isoos

app/lib/tool/backfill/backfill_new_fields.dart

@@ -3,10 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:logging/logging.dart';
-import 'package:pub_dev/account/models.dart';
-import 'package:pub_dev/package/models.dart';
-import 'package:pub_dev/publisher/models.dart';
-import 'package:pub_dev/shared/datastore.dart';
 
 final _logger = Logger('backfill_new_fields');
 
@@ -16,27 +12,5 @@ final _logger = Logger('backfill_new_fields');
 /// CHANGELOG.md must be updated with the new fields, and the next
 /// release could remove the backfill from here.
 Future<void> backfillNewFields() async {
-  await _removeKnownUnmappedFields();
-}
-
-Future<void> _removeKnownUnmappedFields() async {
-  _logger.info('Removing unmapped fields...');
-
-  Future<void> removeIsBlocked<T extends ExpandoModel>() async {
-    await for (final p in dbService.query<T>().run()) {
-      if (p.additionalProperties.isEmpty) continue;
-      if (p.additionalProperties.containsKey('isBlocked')) {
-        await withRetryTransaction(dbService, (tx) async {
-          final e = await tx.lookupValue<T>(p.key);
-          e.additionalProperties.remove('isBlocked');
-          tx.insert(e);
-        });
-      }
-    }
-  }
-
-  await removeIsBlocked<Package>();
-  await removeIsBlocked<Publisher>();
-  await removeIsBlocked<User>();
-  _logger.info('Removing unmapped fields completed.');
+  _logger.info('No new fields.');
 }