[Save card dialog] Remove double border on CC icon

Credit card assets already have a border, so adding a solid border
around the icon on the UI is not needed.

Bug: 852379
Change-Id: Ifb11db8a27e4914b9c7f373ae4bc35d2780358b2
Reviewed-on: https://chromium-review.googlesource.com/1099760Reviewed-by: Evan Stade <estade@chromium.org>
Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567026}

chrome/browser/ui/views/autofill/save_card_bubble_views.cc

@@ -249,8 +249,6 @@ std::unique_ptr<views::View> SaveCardBubbleViews::CreateMainContentView() {
           .GetImageNamed(CreditCard::IconResourceId(card.network()))
           .AsImageSkia());
   card_type_icon->SetTooltipText(card.NetworkForDisplay());
-  card_type_icon->SetBorder(
-      views::CreateSolidBorder(1, SkColorSetA(SK_ColorBLACK, 10)));
   description_view->AddChildView(card_type_icon);
 
   description_view->AddChildView(