Remove duplicate initialization of langs

Author: CharrafiMed

src/Highlighter.php

@@ -49,14 +49,12 @@ public function __construct(
             ->addLanguage(new GdscriptLanguage())
             ->addLanguage(new HtmlLanguage())
             ->addLanguage(new JavaScriptLanguage())
-            ->addLanguage(new JavaScriptLanguage())
             ->addLanguage(new JsonLanguage())
             ->addLanguage(new PhpLanguage())
             ->addLanguage(new PythonLanguage())
             ->addLanguage(new SqlLanguage())
             ->addLanguage(new XmlLanguage())
             ->addLanguage(new YamlLanguage())
-            ->addLanguage(new YamlLanguage())
             ->addLanguage(new TwigLanguage());
     }