Remove now-obsolete BACKUP_DATA permission

Change-Id: I4cbda5355b9ed486df858bbc22b6fef1ae21c08d
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 7eab984..b24a7a9 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -18,8 +18,6 @@
         package="com.android.providers.userdictionary"
         android:sharedUserId="android.uid.shared">
 
-    <uses-permission android:name="android.permission.BACKUP_DATA" />
-
     <application android:process="android.process.acore"
         android:allowClearUserData="false"
         android:backupAgent="DictionaryBackupAgent"