Remove unused deprecated autoroll mirror-remote flag (#142738)
Flag removed in recipe https://flutter-review.googlesource.com/c/recipes/+/46722
diff --git a/dev/conductor/core/bin/packages_autoroller.dart b/dev/conductor/core/bin/packages_autoroller.dart
index a890927..138bdf7 100644
--- a/dev/conductor/core/bin/packages_autoroller.dart
+++ b/dev/conductor/core/bin/packages_autoroller.dart
@@ -39,11 +39,6 @@
help: 'Path to GitHub CLI client. If not provided, it is assumed `gh` is '
'present on the PATH.',
);
- // TODO(fujino): delete after recipe has been migrated to stop passing this
- parser.addOption(
- 'mirror-remote',
- help: '(Deprecated) this is now a no-op. To change the account, edit this tool.',
- );
parser.addOption(
kUpstreamRemote,
help: 'The upstream git remote that the feature branch will be merged to.',
