Delete missed TODO

This TODO was actioned in
https://chromium-review.googlesource.com/c/chromium/src/+/1237615,
but I apparently forgot to remove the actual TODO.

Change-Id: I8298cb9a8c180fc86503df53b60e301b65101e3b
Reviewed-on: https://chromium-review.googlesource.com/c/1489517
Commit-Queue: Jared Saul <jsaul@google.com>
Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
Auto-Submit: Jared Saul <jsaul@google.com>
Reviewed-by: Fabio Tirelo <ftirelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635700}

chrome/browser/ui/autofill/save_card_bubble_controller_impl_unittest.cc

@@ -116,7 +116,6 @@ class SaveCardBubbleControllerImplTest : public BrowserWithTestWindowTest {
       CreditCard* card = nullptr,
       AutofillClient::SaveCreditCardOptions options =
           AutofillClient::SaveCreditCardOptions().with_show_prompt()) {
-    // TODO(crbug.com/852562): Migrate this to BindOnce/OnceClosure.
     controller()->OfferLocalSave(
         card ? CreditCard(*card)
              : autofill::test::GetCreditCard(),  // Visa by default