### Is there an existing issue for this? - [X] I have searched the [existing issues](https://github.com/flutter/flutter/issues) - [X] I have read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports) ### Use case Right now, the only way to do this is to manually delete `flutter/bin/cache`. ### Proposal Add a new sub-command (what command name?) that deletes `flutter/bin/cache`.