Unregisters a post type and removes the menu item

gistfile1.php

<?php

/*
 * Usage for a custom post type named 'movies':
 * unregister_post_type( 'movies' );
 *
 * Usage for the built in 'post' post type:
 * unregister_post_type( 'post', 'edit.php' );
*/
function unregister_post_type( $post_type, $slug = '' ){
	
	global $wp_post_types;
	
	if ( isset( $wp_post_types[ $post_type ] ) ) {
            unset( $wp_post_types[ $post_type ] );
        	
            $slug = ( !$slug ) ? 'edit.php?post_type=' . $post_type : $slug;
            remove_menu_page( $slug );
	}
}
?>

WordPress has this built in since 4.5: https://developer.wordpress.org/reference/functions/unregister_post_type/

@fgilio good find, just note that the function can't be used to remove default post types.

None of that worked for me; but probably because the CPT's were from the theme it self. "Flora"

What did work: [placed within child theme --> functions.php]

function delete_post_type(){
    unregister_post_type( 'wyde_portfolio' );
    unregister_post_type('wyde_team_member');
    unregister_post_type('wyde_testimonial');
}
add_action('init','delete_post_type');

Then used a plugin to rid DB of the post's data.
CPT Cleanup

None of this worked for me.. Why do we continue to use this horrible CMS? #clownworld

@fgilio it may be built in. - but doesn't work as this thread shows it is a clusterF8ck nightmare of a solution.

If you created the cpti in the admin panel - you have to delete it from the admin panel . functions.php doesn't seem to have any effect at all - shocking , I know. .. smh