Removed unused 'standard' option for PhpCpd plugin (#1249)

PHPCI/Plugin/PhpCpd.php

@@ -50,17 +50,12 @@ class PhpCpd implements \PHPCI\Plugin
         $this->build = $build;
 
         $this->path = $phpci->buildPath;
-        $this->standard = 'PSR1';
         $this->ignore = $phpci->ignore;
 
         if (!empty($options['path'])) {
             $this->path = $phpci->buildPath . $options['path'];
         }
 
-        if (!empty($options['standard'])) {
-            $this->standard = $options['standard'];
-        }
-
         if (!empty($options['ignore'])) {
             $this->ignore = $options['ignore'];
         }