Freemius - WordPress Head Cleanup

functions.php

<?php
// Disable emoji.
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'wp_print_styles', 'print_emoji_styles' );

// Cleanup RPC.
remove_action( 'wp_head', 'rsd_link' );
remove_action( 'wp_head', 'wlwmanifest_link' );

// Cleanup oembed.
remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );
remove_action( 'wp_head', 'wp_oembed_add_host_js' );

// Remove WP generator meta.
remove_action( 'wp_head', 'wp_generator' );

// Disable XML RPC
add_filter( 'xmlrpc_methods', function ( $methods ) {
	unset( $methods['pingback.ping'] );

	return $methods;
} );

// Disable RESTful API.
add_filter('json_enabled', '__return_false');
add_filter('json_jsonp_enabled', '__return_false');