remove unused code in PrivacySettings

factory_reset is already removed from privacy_settings.xml,
so it need to be removed from PrivacySettings.java too

Change-Id: I0d295b90173102efb962dde496cf7a8b15d1e0a9
Signed-off-by: songkailun <songkailun@xiaomi.com>
diff --git a/src/com/android/settings/PrivacySettings.java b/src/com/android/settings/PrivacySettings.java
index a44e182..e547570 100644
--- a/src/com/android/settings/PrivacySettings.java
+++ b/src/com/android/settings/PrivacySettings.java
@@ -63,7 +63,6 @@
     @VisibleForTesting
     static final String DATA_MANAGEMENT = "data_management";
     private static final String BACKUP_INACTIVE = "backup_inactive";
-    private static final String FACTORY_RESET = "factory_reset";
     private static final String TAG = "PrivacySettings";
     private IBackupManager mBackupManager;
     private Preference mBackup;
@@ -245,9 +244,5 @@
             nonVisibleKeys.add(AUTO_RESTORE);
             nonVisibleKeys.add(CONFIGURE_ACCOUNT);
         }
-        if (RestrictedLockUtils.hasBaseUserRestriction(context,
-                UserManager.DISALLOW_FACTORY_RESET, UserHandle.myUserId())) {
-            nonVisibleKeys.add(FACTORY_RESET);
-        }
     }
 }