minor #5631 DX: config deduplication (keradus)

This PR was merged into the 2.19-dev branch.

Discussion
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DX: config deduplication

Commits
-------

dcfa6fd DX: config deduplication

.php-cs-fixer.dist.php

@@ -10,54 +10,6 @@
  * with this source code in the file LICENSE.
  */
 
-$header = <<<'EOF'
-This file is part of PHP CS Fixer.
+// @TODO 3.0: make this file the only distributed config file and remove `.php_cs.dist` file.
 
-(c) Fabien Potencier <fabien@symfony.com>
-    Dariusz Rumiński <dariusz.ruminski@gmail.com>
-
-This source file is subject to the MIT license that is bundled
-with this source code in the file LICENSE.
-EOF;
-
-$finder = PhpCsFixer\Finder::create()
-    ->exclude('tests/Fixtures')
-    ->in(__DIR__)
-    ->append([
-        __DIR__.'/dev-tools/doc.php',
-        __DIR__.'/php-cs-fixer',
-    ])
-;
-
-$config = new PhpCsFixer\Config();
-$config
-    ->setRiskyAllowed(true)
-    ->setRules([
-        '@PHP56Migration' => true,
-        '@PHPUnit75Migration:risky' => true,
-        '@PhpCsFixer' => true,
-        '@PhpCsFixer:risky' => true,
-        'header_comment' => ['header' => $header],
-        'list_syntax' => ['syntax' => 'long'],
-    ])
-    ->setFinder($finder)
-;
-
-// special handling of fabbot.io service if it's using too old PHP CS Fixer version
-if (false !== getenv('FABBOT_IO')) {
-    try {
-        PhpCsFixer\FixerFactory::create()
-            ->registerBuiltInFixers()
-            ->registerCustomFixers($config->getCustomFixers())
-            ->useRuleSet(new PhpCsFixer\RuleSet($config->getRules()))
-        ;
-    } catch (PhpCsFixer\ConfigurationException\InvalidConfigurationException $e) {
-        $config->setRules([]);
-    } catch (UnexpectedValueException $e) {
-        $config->setRules([]);
-    } catch (InvalidArgumentException $e) {
-        $config->setRules([]);
-    }
-}
-
-return $config;
+return require ".php_cs.dist";

.php_cs.dist

@@ -10,8 +10,6 @@
  * with this source code in the file LICENSE.
  */
 
-// HARD copy of .php-cs-fixer.dist.php file for fabbot.io compatibility for PHP CS Fixer v2
-
 $header = <<<'EOF'
 This file is part of PHP CS Fixer.