fixing a linting issue

@@ -13,7 +13,6 @@ const ntoh = function(word) {
     (word >>> 24);
 };
 
-
 /* eslint-disable max-len */
 /**
  * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.
@@ -96,7 +95,6 @@ export const decrypt = function(encrypted, key, initVector) {
   return decrypted;
 };
 
-
 export class Decrypter {
   constructor(encrypted, key, initVector, done) {
     let step = Decrypter.STEP;