Function uninstall_with_policy 

pub fn uninstall_with_policy(
    request: UninstallRequest<'_>,
    activation_policy: ActivationPolicy,
) -> Result<RemoveReport>

Removes a completion script with explicit activation cleanup intent.

Use this when the completion file lives at a custom path and you still want shellcomp to clean up managed activation wiring for shells such as Bash or Zsh.