Remove unnecessary abstraction

app/scripts/lib/idStore.js

@@ -221,7 +221,7 @@ IdentityStore.prototype._createIdmgmt = function(password, seed, entropy, cb){
 
     // returning user, recovering from storage
     } else if (serializedKeystore) {
-      keyStore = this.deserializeKeystore(serializedKeystore)
+      keyStore = LightwalletKeyStore.deserialize(serializedKeystore)
       var isCorrect = keyStore.isDerivedKeyCorrect(derivedKey)
       if (!isCorrect) return cb(new Error('Lightwallet - password incorrect'))
 
@@ -252,10 +252,6 @@ IdentityStore.prototype._restoreFromSeed = function(password, seed, derivedKey)
   return keyStore
 }
 
-IdentityStore.prototype.deserializeKeystore = function(serializedKeystore) {
-  return LightwalletKeyStore.deserialize(serializedKeystore)
-}
-
 IdentityStore.prototype._createFirstWallet = function(entropy, derivedKey) {
   var secretSeed = LightwalletKeyStore.generateRandomSeed(entropy)
   var keyStore = new LightwalletKeyStore(secretSeed, derivedKey, this.hdPathString)