bbp_filter_blog_editable_roles( array $all_roles = array() )

function bbp_filter_blog_editable_roles( $all_roles = array() ) {

	// Loop through Forums roles
	foreach ( array_keys( bbp_get_dynamic_roles() ) as $bbp_role ) {

		// Loop through WordPress roles
		foreach ( array_keys( $all_roles ) as $wp_role ) {

			// If keys match, unset
			if ( $wp_role === $bbp_role ) {
				unset( $all_roles[$wp_role] );
			}
		}
	}

	return $all_roles;
}