[iOS] Removing deprecated API to open ASM 5/5

Removing the deprecated API to open Account Settings Manager.

Related to:
crrev.com/c/1349969 (Adding new API in ChromeIdentityService)
crrev.com/i/721689 (Implementation in ChromeIdentityServiceImpl)
crrev.com/c/1350630 (Switching to the new API)
crrev.com/i/721693 (Removing old implementation in ChromeIdentityServiceImpl)

Bug: 905680
Change-Id: Id3d95331035290a80f32fd139c499430e53243c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1350185
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#669982}

ios/public/provider/chrome/browser/signin/chrome_identity_service.h

@@ -111,13 +111,6 @@ class ChromeIdentityService {
       ChromeIdentity* identity,
       id<ChromeIdentityBrowserOpener> browser_opener);
 
-  // Returns a new Web and App Setting Details controller to present.
-  // Deprecated, crbug.com/905680.
-  // Please use PresentWebAndAppSettingDetailsController().
-  virtual UINavigationController* CreateWebAndAppSettingDetailsController(
-      ChromeIdentity* identity,
-      id<ChromeIdentityBrowserOpener> browser_opener);
-
   // Presents a new Web and App Setting Details view.
   // |identity| the identity used to present the view.
   // |viewController| the view to present the setting details.

ios/public/provider/chrome/browser/signin/chrome_identity_service.mm

@@ -33,13 +33,6 @@ UINavigationController* ChromeIdentityService::CreateAccountDetailsController(
   return nil;
 }
 
-UINavigationController*
-ChromeIdentityService::CreateWebAndAppSettingDetailsController(
-    ChromeIdentity* identity,
-    id<ChromeIdentityBrowserOpener> browser_opener) {
-  return nil;
-}
-
 DismissWebAndAppSettingDetailsControllerBlock
 ChromeIdentityService::PresentWebAndAppSettingDetailsController(
     ChromeIdentity* identity,