[Jetpack] Force deactivate all modules but stats

plugin.php

<?php

// Force deactivate all Jetpack modules, except for stats
function jeherve_force_deactivate_everything_but_stats() {
	if ( class_exists( 'Jetpack_Options' ) )
		Jetpack_Options::update_option( 'active_modules', array_unique( array( 'stats' ) ) );
}
add_action( 'init', 'jeherve_force_deactivate_everything_but_stats' );