You may never need to stash again! Okay, stash is still useful for tiny stuff, but worktrees are so much better for long-lived changes.
However, at some point you will need to clean up your worktrees. The simplest way is the remove subcommand:
git worktree remove WORKTREE_NAME
An alternative is to delete the directory manually, then prune all the worktrees (removing the references to deleted directories):
git worktree prune
Run and submit the CLI tests from the root of the main working tree.