Removing the testimonial pattern

Hi, I need to remove the Slider Testimonial pattern that is added by the Gutenslider plugin.
I tried this code to unregister it but it’s not working:

add_action('init', function() {
	if (!function_exists('unregister_block_pattern')) {
		return;
	}
	unregister_block_pattern('eedee/testimonial-slider');
});

‘
Can you point me in the right direction?

thanks