Simply deleting XMLRPC file

I have never used XMLRPC for any activity for my WordPress sites and also not going to do so.

There are many articles on disabling XMLRPC on your site for additional security. In the use case scenario that I discussed when if that service is not required, why to disbale it or make it more secure ? I just wish to simply delete the xmlrpc.php. Will it cause any errors if I delete it ?

You shouldn’t delete that file – it will be restored after update – so deleting it makes no sense (and it shouldn’t be treated as security fix).

You can disable XMLRPC using filter:

add_filter('xmlrpc_enabled', '__return_false');

And even block access to that file. Below code for Apache (sandrodz showed code for nginx):

<Files xmlrpc.php>
    Order deny,allow
    Deny from all
</Files>