use fs.rm from stdlib to simplify remove task

gulp.d/tasks/remove.js

@@ -1,44 +1,9 @@
 'use strict'
 
-const { promises: fsp } = require('fs')
+const fs = require('fs')
 const { Transform } = require('stream')
-const ospath = require('path')
 const map = (transform) => new Transform({ objectMode: true, transform })
 const vfs = require('vinyl-fs')
 
 module.exports = (files) => () =>
-  vfs.src(files, { allowEmpty: true }).pipe(map((file, enc, next) => remove(file.path, next)))
-
-function remove (dir, cb) {
-  return rmdir(dir).then(cb).catch(cb)
-}
-
-/**
- * Removes the specified directory (including all of its contents) or file.
- * Equivalent to fs.promises.rmdir(dir, { recursive: true }) in Node 12.
- */
-function rmdir (dir) {
-  return fsp
-    .readdir(dir, { withFileTypes: true })
-    .then((lst) =>
-      Promise.all(
-        lst.map((it) =>
-          it.isDirectory()
-            ? rmdir(ospath.join(dir, it.name))
-            : fsp.unlink(ospath.join(dir, it.name)).catch((unlinkErr) => {
-              if (unlinkErr.code !== 'ENOENT') throw unlinkErr
-            })
-        )
-      )
-    )
-    .then(() => fsp.rmdir(dir))
-    .catch((err) => {
-      if (err.code === 'ENOENT') return
-      if (err.code === 'ENOTDIR') {
-        return fsp.unlink(dir).catch((unlinkErr) => {
-          if (unlinkErr.code !== 'ENOENT') throw unlinkErr
-        })
-      }
-      throw err
-    })
-}
+  vfs.src(files, { allowEmpty: true }).pipe(map((file, enc, next) => fs.rm(file.path, { recursive: true }, next)))