Disconnect one click sign in code. The code itself will be removed in followup

chrome/browser/ui/sync/one_click_signin_helper.h

Index: chrome/browser/ui/sync/one_click_signin_helper.h
diff --git a/chrome/browser/ui/sync/one_click_signin_helper.h b/chrome/browser/ui/sync/one_click_signin_helper.h
index 4366c365ebc508e7d2bf31b0c517fcfd3f5e46ba..335ad333f65b495ee8a6a3c3ee4deee7471ac9d1 100644
--- a/chrome/browser/ui/sync/one_click_signin_helper.h
+++ b/chrome/browser/ui/sync/one_click_signin_helper.h
@@ -335,12 +335,6 @@ class OneClickSigninHelper
       const content::FrameNavigateParams& params) override;
   void DidStopLoading(content::RenderViewHost* render_view_host) override;
 
-  OneClickSigninSyncStarter::Callback CreateSyncStarterCallback();
-
-  // Callback invoked when OneClickSigninSyncStarter completes sync setup.
-  void SyncSetupCompletedCallback(
-      OneClickSigninSyncStarter::SyncSetupResult result);
-
   // Tracks if we are in the process of showing the signin or one click
   // interstitial page. It's set to true the first time we load one of those
   // pages and set to false when transient state is cleaned.