remove FormatViewHelper - not used and not usable in current state

extensions/ter_fe2/Classes/ViewHelpers/FormatViewHelper.php

-<?php
-namespace T3o\TerFe2\ViewHelpers;
-
-/*
- * This file is part of the TYPO3 CMS project.
- *
- * It is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License, either version 2
- * of the License, or any later version.
- *
- * For the full copyright and license information, please read the
- * LICENSE.txt file that was distributed with this source code.
- *
- * The TYPO3 project - inspiring people to share!
- */
-
-/**
- * Format view helper
- */
-class FormatViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper
-{
-
-    /**
-     * Disable the escaping interceptor
-     */
-    protected $escapingInterceptorEnabled = false;
-
-    /**
-     * Formats content with given function
-     *
-     * @param string $function Function to format the content
-     * @param mixed $content Content
-     * @return string Formated content
-     * @throws \Exception
-     */
-    public function render($function, $content = null)
-    {
-        if ($content === null) {
-            $content = $this->renderChildren();
-        }
-
-        if (empty($function) || !function_exists($function)) {
-            throw new \Exception('Function "' . $function . '" not found to modify content');
-        }
-
-        if (!is_string($content) && !is_array($content)) {
-            throw new \Exception('"' . ucfirst(gettype($content)) . '" is not an allowed type in format view helper');
-        }
-
-        if (is_array($content)) {
-            return call_user_func_array($function, $content);
-        }
-
-        return call_user_func($function, $content);
-    }
-}