Remove unused rimraf spec dependency

spec/api-crash-reporter-spec.js

@@ -3,7 +3,6 @@ const fs = require('fs')
 const http = require('http')
 const multiparty = require('multiparty')
 const path = require('path')
-const rimraf = require('rimraf')
 const temp = require('temp').track()
 const url = require('url')
 const {closeWindow} = require('./window-helpers')

spec/package.json

@@ -6,11 +6,10 @@
   "devDependencies": {
     "basic-auth": "^1.0.0",
     "graceful-fs": "3.0.5",
-    "mkdirp": "0.5.1",
     "mocha": "2.1.0",
+    "mkdirp": "0.5.1",
     "multiparty": "4.1.2",
     "q": "0.9.7",
-    "rimraf": "^2.5.4",
     "temp": "0.8.1",
     "walkdir": "0.0.7",
     "ws": "0.7.2",