diff --git a/build/.eslintrc.json b/build/.eslintrc.json
deleted file mode 100644
index 6969a46d4..000000000
--- a/build/.eslintrc.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "env": {
-    "browser": false,
-    "node": true
-  },
-  "parserOptions": {
-    "sourceType": "script"
-  },
-  "extends": "../.eslintrc.json",
-  "rules": {
-    "no-console": "off",
-    "strict": "error",
-    "unicorn/prefer-module": "off"
-  }
-}
diff --git a/build/esbuild.config.js b/build/esbuild.config.js
deleted file mode 100644
index 518516ca9..000000000
--- a/build/esbuild.config.js
+++ /dev/null
@@ -1,33 +0,0 @@
-'use strict'
-
-const esbuild = require('esbuild')
-// const { getTarget } = require('./get.browserslist.target')
-
-const pkg = require('../package')
-const year = new Date().getFullYear()
-const banner = `/*!
- * AdminLTE v${pkg.version} (${pkg.homepage})
- * Copyright 2014-${year} ${pkg.author}
- * Licensed under MIT (https://github.com/ColorlibHQ/AdminLTE/blob/master/LICENSE)
- */`
-
-esbuild.build({
-  entryPoints: ['ts/adminlte.ts'],
-  banner: {
-    js: banner
-  },
-  bundle: true,
-  color: true,
-  format: 'iife',
-  sourcemap: true,
-  target: ['chrome60'],
-
-  /* will be enable after release of alpha */
-  // target: getTarget(['es', 'chrome', 'edge', 'firefox', 'ios', 'safari']),
-
-  outfile: 'dist/js/adminlte.js'
-}).then(
-  console.log('build/ts/adminlte.ts is BUILD')
-).catch(
-  error => console.error(error)
-)
diff --git a/build/get.browserslist.target.js b/build/get.browserslist.target.js
deleted file mode 100644
index 77ef5cac5..000000000
--- a/build/get.browserslist.target.js
+++ /dev/null
@@ -1,39 +0,0 @@
-'use strict'
-
-const browserslist = require('browserslist')
-
-function getBuildTargets(targ) {
-  const SUPPORTED_BUILD_TARGETS = targ !== 'default' ?
-    targ :
-    [
-      'es',
-      'chrome',
-      'edge',
-      'firefox',
-      'ios',
-      'node',
-      'safari'
-    ]
-
-  const getEveryTar = browserslist().reverse()
-  const sep = ' '
-  const targets = []
-  let singleTar = ''
-  let i = 0
-
-  for (const tar of getEveryTar) {
-    for (const selTar of SUPPORTED_BUILD_TARGETS) {
-      if (tar.startsWith(selTar + sep) && !singleTar.startsWith(selTar)) {
-        i++
-        singleTar = tar.replace(sep, '')
-        targets[i] = singleTar
-      }
-    }
-  }
-
-  return targets.filter(Boolean)
-}
-
-module.exports.getTarget = targ => {
-  return getBuildTargets(targ)
-}
diff --git a/build/postcss.config.js b/build/postcss.config.js
deleted file mode 100644
index c55226bd6..000000000
--- a/build/postcss.config.js
+++ /dev/null
@@ -1,17 +0,0 @@
-'use strict'
-
-module.exports = ctx => {
-  return {
-    map: {
-      inline: false,
-      annotation: true,
-      sourcesContent: true
-    },
-    plugins: {
-      autoprefixer: {
-        cascade: false
-      },
-      rtlcss: ctx.env === 'RTL' ? {} : false
-    }
-  }
-}