Revert "Assert on the success of enqueue before returning"

This reverts commit 16d8c8b33b.
Because it breaks everything

lib/pleroma/user.ex

@@ -278,7 +278,6 @@ def register(%Ecto.Changeset{} = changeset) do
   def try_send_confirmation_email(%User{} = user) do
     if user.info.confirmation_pending &&
          Pleroma.Config.get([:instance, :account_activation_required]) do
-      :ok =
       user
       |> Pleroma.Emails.UserEmail.account_confirmation_email()
       |> Pleroma.Emails.Mailer.deliver_async()