Eliminate stale PO2TS includes from one_click_signin_sync_starter.cc

There are no references to either ProfileOAuth2TokenServiceFactory or
ProfileOAuth2TokenService, so these includes can be safely removed.

Bug: 890237
Change-Id: If484fd41a20ef88b59a91777d741c368fc36ba17
Reviewed-on: https://chromium-review.googlesource.com/1251045Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Cr-Commit-Position: refs/heads/master@{#595462}

chrome/browser/ui/sync/one_click_signin_sync_starter.cc

@@ -19,7 +19,6 @@
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/signin/account_tracker_service_factory.h"
-#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/signin/signin_tracker_factory.h"
 #include "chrome/browser/signin/signin_util.h"
@@ -40,7 +39,6 @@
 #include "components/account_id/account_id.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/prefs/pref_service.h"
-#include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/browser/signin_metrics.h"
 #include "components/sync/base/sync_prefs.h"