Remove kAutofillWalletSyncExperimentEnabled.

components/autofill/core/common/autofill_pref_names.cc

 // 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 "components/autofill/core/common/autofill_pref_names.h"
 
 namespace autofill {
 namespace prefs {
 
 // Boolean that is true if Autofill is enabled and allowed to save profile data.
 const char kAutofillEnabled[] = "autofill.enabled";
 
 // Boolean that's true when Wallet card and address import is enabled by the
-// user. This will only be available to the user if the overall feature is
-// enabled.
+// user.
 const char kAutofillWalletImportEnabled[] = "autofill.wallet_import_enabled";
 
 // Boolean that allows the "Don't ask again for this card" checkbox to be
 // sticky.
 const char kAutofillWalletImportStorageCheckboxState[] =
     "autofill.wallet_import_storage_checkbox_state";
 
-// Enables/disables the Wallet card and address feature. Set via sync
-// experiment.
-const char kAutofillWalletSyncExperimentEnabled[] =
-    "autofill.wallet_import_sync_experiment_enabled";
-
 }  // namespace prefs
 }  // namespace autofill