Update to eslint 1.2.1

packages/ripple-keypairs/package.json

@@ -28,7 +28,7 @@
     "babel-eslint": "^4.0.5",
     "babel-loader": "^5.3.2",
     "coveralls": "~2.10.0",
-    "eslint": "^1.2.0",
+    "eslint": "^1.2.1",
     "eventemitter2": "^0.4.14",
     "istanbul": "~0.3.5",
     "lodash": "^3.10.0",

packages/ripple-keypairs/src/utils.js

@@ -3,13 +3,19 @@
 const hashjs = require('hash.js');
 const Sha512 = require('./sha512');
 
+function unused() {}
+
 function isVirtual(_, __, descriptor) {
+  unused(_, __);
+
   descriptor.value = function() {
     throw new Error('virtual method not implemented ');
   };
 }
 
 function cached(_, name, descriptor) {
+  unused(_);
+
   const computer = descriptor.value;
   const key = '_' + name;
   descriptor.value = function() {