Remove ChromeBrowserProvider::GetLiveTabContextProvider() method.

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

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 
 #include <cstddef>
 
 #include "base/logging.h"
 #include "components/metrics/metrics_provider.h"
@@ skipping 31 matching lines @@
   return nullptr;
 }
 
 void ChromeBrowserProvider::SetChromeIdentityServiceForTesting(
     std::unique_ptr<ChromeIdentityService> service) {}
 
 ChromeIdentityService* ChromeBrowserProvider::GetChromeIdentityService() {
   return nullptr;
 }
 
-LiveTabContextProvider* ChromeBrowserProvider::GetLiveTabContextProvider() {
-  return nullptr;
-}
-
 GeolocationUpdaterProvider*
 ChromeBrowserProvider::GetGeolocationUpdaterProvider() {
   return nullptr;
 }
 
 std::string ChromeBrowserProvider::DataReductionProxyAvailability() {
   return "default";
 }
 
 std::string ChromeBrowserProvider::GetDistributionBrandCode() {
@@ skipping 82 matching lines @@
 id<NativeAppWhitelistManager>
 ChromeBrowserProvider::GetNativeAppWhitelistManager() const {
   return nil;
 }
 
 void ChromeBrowserProvider::HideModalViewStack() const {}
 
 void ChromeBrowserProvider::LogIfModalViewsArePresented() const {}
 
 }  // namespace ios