Remove ChromeBrowserProvider::CreateCardUnmaskPromptView().

ios/public/provider/chrome/browser/chrome_browser_provider.mm

Index: ios/public/provider/chrome/browser/chrome_browser_provider.mm
diff --git a/ios/public/provider/chrome/browser/chrome_browser_provider.mm b/ios/public/provider/chrome/browser/chrome_browser_provider.mm
index d2303cfad5b875f6fad916ce73a41fbd722502e9..211c80a8b5da7e9aed9056e4d6f45402cd29725d 100644
--- a/ios/public/provider/chrome/browser/chrome_browser_provider.mm
+++ b/ios/public/provider/chrome/browser/chrome_browser_provider.mm
@@ -62,12 +62,6 @@ std::string ChromeBrowserProvider::GetDistributionBrandCode() {
   return std::string();
 }
 
-autofill::CardUnmaskPromptView*
-ChromeBrowserProvider::CreateCardUnmaskPromptView(
-    autofill::CardUnmaskPromptController* controller) {
-  return nullptr;
-}
-
 std::string ChromeBrowserProvider::GetRiskData() {
   return std::string();
 }