Function worktree_remove 

pub fn worktree_remove(
    repo_path: &Path,
    worktree: &Path,
    force: bool,
) -> Result<(), String>

Removes the worktree checked out at worktree, deleting its directory.

Without force, git refuses a worktree with modified or untracked files, or a locked one, and nothing is touched. With force, --force is passed twice, which discards those changes and overrides the lock.