MAGETWO-31369: [South] Unit and Integration tests coverage

Author: AndriyNasinnyk

app/code/Magento/Theme/Model/CopyService.php

@@ -197,11 +197,10 @@ protected function _copyFilesRecursively($baseDir, $sourceDir, $targetDir)
      */
     protected function _deleteFilesRecursively($targetDir)
     {
-        if (!$this->_directory->isExist($targetDir)) {
-            return;
-        }
-        foreach ($this->_directory->read($targetDir) as $path) {
-            $this->_directory->delete($path);
+        if ($this->_directory->isExist($targetDir)) {
+            foreach ($this->_directory->read($targetDir) as $path) {
+                $this->_directory->delete($path);
+            }
         }
     }
 }