remove blockchain explorer dependency from email service

lib/emailservice.js

@@ -14,7 +14,6 @@ var Utils = require('./common/utils');
 var Storage = require('./storage');
 var MessageBroker = require('./messagebroker');
 var Lock = require('./lock');
-var BlockchainExplorer = require('./blockchainexplorer');
 
 var Model = require('./model');
 
@@ -99,27 +98,6 @@ EmailService.prototype.start = function(opts, cb) {
       self.lock = opts.lock || new Lock(opts.lockOpts);
       done();
     },
-    function(done) {
-      self.explorers = _.indexBy(_.map(['livenet', 'testnet'], function(network) {
-        var explorer;
-        if (opts.blockchainExplorers) {
-          explorer = opts.blockchainExplorers[network];
-        } else {
-          var config = {}
-          if (opts.blockchainExplorerOpts && opts.blockchainExplorerOpts[network]) {
-            config = opts.blockchainExplorerOpts[network];
-          }
-          var explorer = new BlockchainExplorer({
-            provider: config.provider,
-            network: network,
-            url: config.url,
-          });
-        }
-        $.checkState(explorer);
-        return explorer;
-      }), 'network');
-      done();
-    },
     function(done) {
       self.mailer = opts.mailer || nodemailer.createTransport(opts.emailOpts);
       done();