Pseudo Code for removing a product type.

gistfile1.php

<?php 

add_filter( 'product_type_selector', 'remove_listing_package'); 

// $product type is an array of product it containts the following: 
// 
// $product_type_selector = apply_filters( 'product_type_selector', array(
// 			'simple'   => __( 'Simple product', 'wcvendors-pro' ),
// 			'grouped'  => __( 'Grouped product', 'wcvendors-pro' ),
// 			'external' => __( 'External/Affiliate product', 'wcvendors-pro' ),
// 			'variable' => __( 'Variable product', 'wcvendors-pro' )
// 		), $product_type );
// 
function remove_listing_package($product_type) { 

	if ( WCV_Vendors::is_vendor( get_current_user_id() ) ) { 
		//unset the array index for listing_package (whatever that is. )
	} 
} 
?>