Removed shelljs. Not used dependency.

lib/node.js

@@ -6,7 +6,6 @@ var os = require('os');
 var web3 = require('web3');
 var async = require('async');
 var _ = require('lodash');
-var shelljs = require('shelljs');
 var debounce = require('debounce');
 var registrar = require('./registrar.js');
 var pjson = require('./../package.json');

package.json

@@ -16,7 +16,6 @@
     "primus": "3.0.2",
     "primus-emit": "0.1.2",
     "primus-spark-latency": "0.1.1",
-    "shelljs": "0.5.0",
     "web3": "0.8.1",
     "ws": "0.7.2"
   },