Remove Custom Post Type Projects in WordPress.php

#region Remove / hide the Projects posttype in backend
function nxt_additional_project_posttype_args( $args ) {
	return array_merge( $args, array(
		'public'				=> false,
		'exclude_from_search'	=> false,
		'publicly_queryable'	=> false,
		'show_in_nav_menus'		=> false,
		'show_ui'				=> false
	));
}
add_filter( 'et_project_posttype_args', 'nxt_additional_project_posttype_args', 10, 1 );
#endregion Remove / hide the Projects posttype in backend

If you want to change the permalink of projects, then change the array that will be merged to the following:

...
return array_merge( $args, array(
'slug' => 'your-custom-permalink',
));
}
add_filter( 'et_project_posttype_args', 'nxt_additional_project_posttype_args', 10, 1 );