<?php


      $args = array(

    'post_type' => array(  'product_variation',),

    // 'post_status' => array(                 //(string / array) - use post status. Retrieves posts by Post Status, default value i'publish'.
    //         // 'publish',                      // - a published post or page.
    //         // 'pending',                      // - post is pending review.
    //         // 'draft',                        // - a post in draft status.
    //         // 'auto-draft',                   // - a newly created post, with no content.
    //         // 'future',                       // - a post to publish in the future.
    //         // 'private',                      // - not visible to users who are not logged in.
    //         // 'inherit',                      // - a revision. see get_children.
    //         // 'trash'                         // - post is in trashbin (available with Version 2.9).
    //         ),
    'posts_per_page' => -1,
);

$the_query = new WP_Query( $args );

// The Loop
global $post;
if ( $the_query->have_posts() ) :
      var_dump($the_query->posts);
while ( $the_query->have_posts() ) : $the_query->the_post();
    wp_delete_post($post->ID);
endwhile;
endif;

// Reset Post Data
wp_reset_postdata();