Remove(legacy): drop PHP v5.3 check on sfRoute

This removes a preliminary fix for a legacy PHP 5.3. issue with regexp excaping
PHP bug reference: http://bugs.php.net/bug.php?id=47229

Author: thePanz

lib/routing/sfRoute.class.php

@@ -668,20 +668,14 @@ protected function initializeOptions()
             'extra_parameters_as_query_string' => true,
         ), $this->getDefaultOptions(), $this->options);
 
-        $preg_quote_hash = function ($a) { return preg_quote($a, '#'); };
+        $preg_quote_hash = static function ($a) { return preg_quote($a, '#'); };
 
         // compute some regexes
         $this->options['variable_prefix_regex'] = '(?:'.implode('|', array_map($preg_quote_hash, $this->options['variable_prefixes'])).')';
 
         if (count($this->options['segment_separators'])) {
             $this->options['segment_separators_regex'] = '(?:'.implode('|', array_map($preg_quote_hash, $this->options['segment_separators'])).')';
-
-            // as of PHP 5.3.0, preg_quote automatically quotes dashes "-" (see http://bugs.php.net/bug.php?id=47229)
-            $preg_quote_hash_53 = function ($a) { return str_replace('-', '\-', preg_quote($a, '#')); };
-            $this->options['variable_content_regex'] = '[^'.implode(
-                '',
-                array_map(version_compare(PHP_VERSION, '5.3.0RC4', '>=') ? $preg_quote_hash : $preg_quote_hash_53, $this->options['segment_separators'])
-            ).']+';
+            $this->options['variable_content_regex'] = '[^'.implode('', array_map($preg_quote_hash, $this->options['segment_separators'])).']+';
         } else {
             // use simplified regexes for case where no separators are used
             $this->options['segment_separators_regex'] = '()';