Testing Suspended

Testing of this plugin has been temporarily suspended due to an error. It will automatically resume when a new plugin version is released.

How to Hide the "Amp Stories for Wordpress" Meta Box

function plt_hide_amp_story_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Amp Stories for Wordpress" meta box.
	remove_meta_box('amp_story_vp_metabox_metabox', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_amp_story_metaboxes', 20);

Where do I put this code?