Removes the IsReadingListEnabled flags

ios/chrome/browser/ui/settings/sync_settings_collection_view_controller.mm

 // Copyright 2015 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.
 
 #import "ios/chrome/browser/ui/settings/sync_settings_collection_view_controller.h"
 
 #include <memory>
 
 #include "base/auto_reset.h"
 #include "base/mac/foundation_util.h"
@@ skipping 287 matching lines @@
       l10n_util::GetNSString(IDS_IOS_SYNC_DATA_TYPES_TITLE);
   [model setHeader:syncServicesHeader
       forSectionWithIdentifier:SectionIdentifierSyncServices];
   BOOL syncEverythingEnabled = _syncSetupService->IsSyncingAllDataTypes();
   [model addItem:[self syncEverythingSwitchItem:syncEverythingEnabled]
       toSectionWithIdentifier:SectionIdentifierSyncServices];
   // Specific Data Types to sync. Enabled if Sync Everything is off.
   for (int i = 0; i < SyncSetupService::kNumberOfSyncableDatatypes; ++i) {
     SyncSetupService::SyncableDatatype dataType =
         static_cast<SyncSetupService::SyncableDatatype>(i);
-    if (!experimental_flags::IsReadingListEnabled() &&
-        dataType == SyncSetupService::kSyncReadingList) {
-      // Display Reading List only if it is enabled.
-      continue;
-    }
     [model addItem:[self switchItemForDataType:dataType]
         toSectionWithIdentifier:SectionIdentifierSyncServices];
   }
 
   // Encryption section.  Enabled if sync is on.
   [model addSectionWithIdentifier:SectionIdentifierEncryptionAndFooter];
   [model addItem:[self encryptionCellItem]
       toSectionWithIdentifier:SectionIdentifierEncryptionAndFooter];
   [model addItem:[self manageSyncedDataItem]
       toSectionWithIdentifier:SectionIdentifierEncryptionAndFooter];
@@ skipping 664 matching lines @@
   [self updateAccountItem:item withIdentity:identity];
   [self reconfigureCellsForItems:@[ item ]
          inSectionWithIdentifier:SectionIdentifierSyncAccounts];
 }
 
 - (void)onChromeIdentityServiceWillBeDestroyed {
   _identityServiceObserver.reset();
 }
 
 @end