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<?php

// prevent divi post-type & taxonomies
function et_pb_register_posttypes() {}
// remove the corresponding modules
function et_builder_filter_portfolio_modules( $modules, $post_type ) {
    foreach ( $modules as $key => $module ) {
        if ( strpos( $key,'portfolio' ) !== false )
        unset( $modules[$key] );
    }
    return $modules;
}
add_filter( 'et_builder_get_parent_modules', 'et_builder_filter_portfolio_modules', 10, 2 );
add_filter( 'et_builder_get_child_modules', 'et_builder_filter_portfolio_modules', 10, 2 );