lstatSync and readdirSync is not needed by require

src/require.coffee

@@ -64,9 +64,6 @@ fs.statSync = (p) ->
   return statSync.apply this, arguments unless isAsar
   asarStatsToFsStats asar.statFile(asarPath, filePath)
 
-# lstatSync is not implemented yet.
-fs.lstatSync = fs.statSync
-
 realpathSync = fs.realpathSync
 fs.realpathSync = (p) ->
   [isAsar, asarPath, filePath] = splitPath p
@@ -74,10 +71,3 @@ fs.realpathSync = (p) ->
   stat = asar.statFile(asarPath, filePath)
   filePath = stat.link if stat.link
   path.join realpathSync(asarPath), filePath
-
-readdirSync = fs.readdirSync
-fs.readdirSync = (p) ->
-  [isAsar, asarPath, filePath] = splitPath p
-  return readdirSync.apply this, arguments unless isAsar
-  stat = asar.statFile(asarPath, filePath, true)
-  file for file,_ of stat.files