fix: remove unused promiseToCallback and trailing whitespace

src/query/index.js

@@ -1,7 +1,6 @@
 'use strict'
 
 const mh = require('multihashes')
-const promiseToCallback = require('promise-to-callback')
 
 const utils = require('../utils')
 const Run = require('./run')

src/query/path.js

@@ -49,7 +49,7 @@ class Path {
  * Execute the path.
  *
  * @returns {Promise}
- * 
+ *
  */
  async execute () {
  // Create a queue of peers ordered by distance from the key

src/query/run.js

@@ -3,7 +3,6 @@
 const PeerDistanceList = require('../peer-distance-list')
 const EventEmitter = require('events')
 const promisify = require('promisify-es6')
-const promiseToCallback = require('promise-to-callback')
 
 const Path = require('./path')
 const WorkerQueue = require('./workerQueue')
@@ -132,7 +131,7 @@ class Run extends EventEmitter {
  * Create and start a worker queue for a particular path.
  *
  * @param {Path} path
- * @returns {Promise<void>} 
+ * @returns {Promise<void>}
  */
  async startWorker (path) {
  const worker = new WorkerQueue(this.query.dht, this, path, this.query._log)