[TIDY] ignore license file, remove old stuff

.gitignore

@@ -1,6 +1,7 @@
 .DS_Store
 /site/accounts
 /site/cache
+/site/config/.license
 /site/sessions
 /media
 /content

modules/columns-plugin/index.php

@@ -1,28 +0,0 @@
-<?php
-# from https://getkirby.com/docs/cookbook/extensions/columns-in-kirbytext
-# copied at 2021-01-23
-
-Kirby::plugin('kirby/columns', [
-  'hooks' => [
-    'kirbytags:before' => function ($text, array $data = []) {
-
-      $text = preg_replace_callback('!\(columns(…|\.{3})\)(.*?)\((…|\.{3})columns\)!is', function($matches) use($text, $data) {
-
-        $columns        = preg_split('!(\n|\r\n)\+{4}\s+(\n|\r\n)!', $matches[2]);
-        $html           = [];
-        $classItem      = $this->option('kirby.columns.item', 'column');
-        $classContainer = $this->option('kirby.columns.container', 'columns');
-
-        foreach ($columns as $column) {
-            $html[] = '<div class="' . $classItem . '">' . $this->kirbytext($column, $data) . '</div>';
-        }
-
-        return '<div class="' . $classContainer . '">' . implode($html) . '</div>';
-
-      }, $text);
-
-      return $text;
-    }
-
-  ]
-]);