We'll create fresh WordPress site with Remove XML-RPC Pingback installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Disable Pingback method from XML-RPC. After activation the plugin automatically disables XML-RPC.
This plugin is more responsive than disabling completely XML-RPC, that it’s required by some plugins and apps (I.e. Jetpack’s modules).
Removes the following methods from XML-RPC interface.