Remove unnecessary @SuppressWarning

Change-Id: I616b524fae2c90ae3efe8d7b2332c37a501350a8
diff --git a/src/com/android/timezonepicker/TimeZoneData.java b/src/com/android/timezonepicker/TimeZoneData.java
index 1e7b001..9302a3c 100644
--- a/src/com/android/timezonepicker/TimeZoneData.java
+++ b/src/com/android/timezonepicker/TimeZoneData.java
@@ -475,7 +475,6 @@
         return processedTimeZones;
     }
 
-    @SuppressWarnings("unused")
     private static Locale mBackupCountryLocale;
     private static String[] mBackupCountryCodes;
     private static String[] mBackupCountryNames;