Remove some dead code

Looks like AddressAccessoryController::GetIfNeeded is not currently
being called.

Bug: None
Change-Id: I4e717c1b481958b79a77bee4615b2d25c9663ee8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416808Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Reviewed-by: sebsg <sebsg@chromium.org>
Commit-Queue: sebsg <sebsg@chromium.org>
Auto-Submit: Ian Vollick <vollick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808989}

chrome/browser/autofill/address_accessory_controller.h

@@ -37,11 +37,6 @@ class AddressAccessoryController
   static AddressAccessoryController* GetOrCreate(
       content::WebContents* web_contents);
 
-  // Returns a reference to the unique AddressAccessoryController associated
-  // with |web_contents|. Returns null if no such instance exists.
-  static AddressAccessoryController* GetIfExisting(
-      content::WebContents* web_contents);
-
   // Fetches suggestions and propagates them to the frontend.
   virtual void RefreshSuggestions() = 0;
 

chrome/browser/autofill/address_accessory_controller_impl.cc

@@ -100,12 +100,6 @@ AddressAccessoryController* AddressAccessoryController::GetOrCreate(
   return AddressAccessoryControllerImpl::FromWebContents(web_contents);
 }
 
-// static
-AddressAccessoryController* AddressAccessoryController::GetIfExisting(
-    content::WebContents* web_contents) {
-  return AddressAccessoryControllerImpl::FromWebContents(web_contents);
-}
-
 void AddressAccessoryControllerImpl::OnFillingTriggered(
     const UserInfo::Field& selection) {
   // Since the data we fill is scoped to the profile and not to a frame, we can