Remove path-exists

This package trivially wraps core node.js functionality. Let's do
without it.

bin/clean.js

@@ -5,9 +5,9 @@
  * Useful for developers.
  */
 
+var fs = require('fs')
 var os = require('os')
 var path = require('path')
-var pathExists = require('path-exists')
 var rimraf = require('rimraf')
 
 var config = require('../config')
@@ -15,7 +15,12 @@ var handlers = require('../main/handlers')
 
 rimraf.sync(config.CONFIG_PATH)
 
-var tmpPath = path.join(pathExists.sync('/tmp') ? '/tmp' : os.tmpDir(), 'webtorrent')
+var tmpPath
+try {
+  tmpPath = path.join(fs.statSync('/tmp') && '/tmp', 'webtorrent')
+} catch (err) {
+  tmpPath = path.join(os.tmpDir(), 'webtorrent')
+}
 rimraf.sync(tmpPath)
 
 // Uninstall .torrent file and magnet link handlers

config.js

@@ -1,6 +1,6 @@
 var appConfig = require('application-config')('WebTorrent')
+var fs = require('fs')
 var path = require('path')
-var pathExists = require('path-exists')
 
 var APP_NAME = 'WebTorrent'
 var APP_TEAM = 'The WebTorrent Project'
@@ -53,7 +53,11 @@ function getConfigPath () {
 }
 
 function isPortable () {
-  return process.platform === 'win32' && isProduction() && pathExists(PORTABLE_PATH)
+  try {
+    return process.platform === 'win32' && isProduction() && !!fs.statSync(PORTABLE_PATH)
+  } catch (err) {
+    return false
+  }
 }
 
 function isProduction () {

package.json

@@ -31,7 +31,6 @@
     "main-loop": "^3.2.0",
     "musicmetadata": "^2.0.2",
     "network-address": "^1.1.0",
-    "path-exists": "^2.1.0",
     "prettier-bytes": "^1.0.1",
     "simple-get": "^2.0.0",
     "srt-to-vtt": "^1.1.1",