refactor: alter-twig.php and _head.twig removing not needed lines

Author: hadl

source/_meta/_head.twig

@@ -7,8 +7,6 @@
   <meta name="viewport" content="width=device-width,initial-scale=1.0">
 
   <link rel="stylesheet" href="../../css/pattern-scaffolding.css?{{ cacheBuster }}" media="all" />
-  {#  webpack dev-server css file  #}
-  <link rel="stylesheet" href="/css/app.css">
 
   <!-- Begin Pattern Lab (Required for Pattern Lab to run properly) -->
   {{ patternLabHead | raw }}

source/_twig/alter-twig.php

@@ -1,34 +1,8 @@
 <?php
-
 /**
  * @param Twig_Environment $env - The Twig Environment - https://twig.symfony.com/api/1.x/Twig_Environment.html
  * @param $config - Config of `@basalt/twig-renderer`
  */
 function addCustomExtension(\Twig_Environment &$env, $config) {
-
-  /**
-   * @example `<h1>Hello {{ customTwigFunctionThatSaysWorld() }}!</h1>` => `<h1>Hello Custom World</h1>`
-   */
-//  $env->addFunction(new \Twig_SimpleFunction('customTwigFunctionThatSaysWorld', function () {
-//    return 'Custom World';
-//  }));
-
-  /*
-   * Reverse a string
-   * @param string $theString
-   * @example `<p>{{ reverse('abc') }}</p>` => `<p>cba</p>`
-   */
-//  $env->addFunction(new \Twig_SimpleFunction('reverse', function ($theString) {
-//    return strrev($theString);
-//  }));
-
-
-//  $env->addExtension(new \My\CustomExtension());
-
-//  `{{ foo }}` => `bar`
-//  $env->addGlobal('foo', 'bar');
-
-  // example of enabling the Twig debug mode extension (ex. {{ dump(my_variable) }} to check out the template's available data) -- comment out to disable
   $env->addExtension(new \Twig_Extension_Debug());
-
 }