Admin login verification

You can use the admin_email_check_interval filter to change the amount of time between these checks. If you set it to 0 then the verification query will never be triggered.

To make this happen you can add the following code to your theme’s functions.php file or a custom plugin:

add_filter( 'admin_email_check_interval', 'custom_remove_admin_email_verification');
function custom_remove_admin_email_verification ( $int ) {
  return 0;
}

I haven’t tested that, but it should work.

That being said, I would generally recommend against doing this as the admin email verification is there as a security measure to make sure that you always receive important notifications and updates about your site.