Tips on Customizing WordPress Review Site Builder

How to Hide Review Site Builder Admin Menus

function plt_hide_wereviews_menus() {
	//Hide "Reviews".
	remove_menu_page('edit.php?post_type=reviews');
	//Hide "Reviews → All Reviews".
	remove_submenu_page('edit.php?post_type=reviews', 'edit.php?post_type=reviews');
	//Hide "Reviews → Add New".
	remove_submenu_page('edit.php?post_type=reviews', 'post-new.php?post_type=reviews');
	//Hide "Reviews → Tags".
	remove_submenu_page('edit.php?post_type=reviews', 'edit-tags.php?taxonomy=post_tag&post_type=reviews');
	//Hide "Reviews → Categories".
	remove_submenu_page('edit.php?post_type=reviews', 'edit-tags.php?taxonomy=genre&post_type=reviews');
}

add_action('admin_menu', 'plt_hide_wereviews_menus', 15);

Where do I put this code?

How to Hide Review Site Builder Meta Boxes

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

	//Hide the "Review Details Get the review themes specially build for this plugin >>" meta box.
	remove_meta_box('reviews-details', $screen->id, 'normal');
	//Hide the "Individual Feature Ratings" meta box.
	remove_meta_box('reviews-rating', $screen->id, 'normal');
	//Hide the "Secondary Image" meta box.
	remove_meta_box('individual-reviews', $screen->id, 'side');
}

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