lint fixes

app/scripts/controllers/transactions.js

@@ -1,11 +1,9 @@
 const EventEmitter = require('events')
-const async = require('async')
 const extend = require('xtend')
-const pify = require('pify')
 const clone = require('clone')
 const ObservableStore = require('obs-store')
 const ethUtil = require('ethereumjs-util')
-const EthQuery = require('ethjs-query');
+const EthQuery = require('ethjs-query')
 const TxProviderUtil = require('../lib/tx-utils')
 const getStack = require('../lib/util').getStack
 const createId = require('../lib/random-id')
@@ -168,7 +166,7 @@ module.exports = class TransactionController extends EventEmitter {
       history: [],
     }
     // add default tx params
-    await this.addTxDefaults(txMeta),
+    await this.addTxDefaults(txMeta)
     // save txMeta
     this.addTx(txMeta)
     return txMeta

app/scripts/lib/tx-utils.js

@@ -1,4 +1,3 @@
-const async = require('async')
 const ethUtil = require('ethereumjs-util')
 const Transaction = require('ethereumjs-tx')
 const normalize = require('eth-sig-util').normalize
@@ -88,7 +87,7 @@ module.exports = class txProvideUtils {
   }
 
   validateTxParams (txParams) {
-    return new Promise ((resolve, reject) => {
+    return new Promise((resolve, reject) => {
       if (('value' in txParams) && txParams.value.indexOf('-') === 0) {
         reject(new Error(`Invalid transaction value of ${txParams.value} not a positive number.`))
       } else {
@@ -111,10 +110,6 @@ module.exports = class txProvideUtils {
 
 // util
 
-function isUndef (value) {
-  return value === undefined
-}
-
 function bnToHex (inputBn) {
   return ethUtil.addHexPrefix(inputBn.toString(16))
 }

app/scripts/metamask-controller.js

@@ -446,7 +446,7 @@ module.exports = class MetamaskController extends EventEmitter {
     this.sendUpdate()
     this.opts.showUnapprovedTx(txMeta)
     // listen for tx completion (success, fail)
-    return new Promise ((resolve, reject) => {
+    return new Promise((resolve, reject) => {
       this.txController.once(`${txMeta.id}:finished`, (completedTx) => {
         switch (completedTx.status) {
           case 'submitted':