PHPfunction remove_jquery_migrate( $scripts ) {

    if ( ! is_admin() && isset( $scripts->registered['jquery'] ) ) {

        $script = $scripts->registered['jquery'];

        if ( $script->deps ) { 

            $script->deps = array_diff( $script->deps, array( 'jquery-migrate' ) );

        }

    }

}

add_action( 'wp_default_scripts', 'remove_jquery_migrate' );