[iOS][MICE] Remove identity section from Google Services Settings.

For MICE we are moving all identity information into the top-level
Settings page. The Google Services Settings will now only contain
the relevant Services information.

Before: https://drive.google.com/file/d/1IaeI3UWGWIeFEWWR8s_FZIFQ_99ZDqha
After: https://drive.google.com/file/d/1jP4iYi5Fewd1o2hn5scJEwaYW-jgmdsK

Bug: 1151296
Change-Id: I6ce11e114873ae9ec411bfb6aeec342c4165083d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2550555Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829665}

ios/chrome/browser/ui/settings/google_services/google_services_settings_mediator.mm

@@ -264,6 +264,10 @@ NSString* kGoogleServicesSyncErrorImage = @"google_services_sync_error";
 // Creates, removes or updates the identity section as needed. And notifies the
 // consumer.
 - (void)updateIdentitySectionAndNotifyConsumer {
+  // Do not display the identity section in Google Services for MICE.
+  if (base::FeatureList::IsEnabled(signin::kMobileIdentityConsistency)) {
+    return;
+  }
   TableViewModel* model = self.consumer.tableViewModel;
   BOOL hasIdentitySection =
       [model hasSectionForSectionIdentifier:IdentitySectionIdentifier];
@@ -810,10 +814,10 @@ NSString* kGoogleServicesSyncErrorImage = @"google_services_sync_error";
 - (void)googleServicesSettingsViewControllerLoadModel:
     (GoogleServicesSettingsViewController*)controller {
   DCHECK_EQ(self.consumer, controller);
-  [self loadIdentitySection];
   // For the MICE experiment Chrome will display the Sync section within "Manage
   // Sync Settings".
   if (!base::FeatureList::IsEnabled(signin::kMobileIdentityConsistency)) {
+    [self loadIdentitySection];
     [self loadSyncSection];
   }
   [self loadNonPersonalizedSection];