Remove jQuery Migrate

WordPress loads jQuery Migrate for backward compatibility. If your site and plugins support modern jQuery, you can remove Migrate and save an HTTP request. Add to your functions.php file. For more on performance optimization.

add_action( 'wp_default_scripts', function( $scripts ) {
	if ( ! is_admin() && isset( $scripts->registered['jquery'] ) ) {
		$script = $scripts->registered['jquery'];
		if ( $script->deps ) {
			$script->deps = array_diff( $script->deps, array( 'jquery-migrate' ) );
		}
	}
} );