prevent note to self on unlink from slave

js/background.js

@@ -1365,6 +1365,11 @@
     });
 
     Whisper.events.on('deviceUnpairingRequested', async (pubKey, callback) => {
+      const isSecondaryDevice = !!textsecure.storage.get('isSecondaryDevice');
+      if (isSecondaryDevice){
+        return;
+      }
+      
       await libloki.storage.removePairingAuthorisationForSecondaryPubKey(
         pubKey
       );