Revert "Fix "Could not delete" Exception on removeDirectory"

This reverts commit b8ccfdf.

It is not necessary any longer.

It was a fix for a problem reported in #122.

Which has fixed upstream in composer as it was a problem there.

- #122
- composer/composer#3158
- composer/composer#3159

Author: tkdb

src/MagentoHackathon/Composer/Magento/Deploystrategy/DeploystrategyAbstract.php

@@ -428,7 +428,7 @@ public static function rmdirRecursive($dir)
     {
         $fs = new \Composer\Util\Filesystem();
         if(is_dir($dir)){
-            $result = $fs->removeDirectory(rtrim($dir,'/'));
+            $result = $fs->removeDirectory($dir);
         }else{
             @unlink($dir);
         }