code: public void postDelete(String blogName, Long postId) {
          Map<String, String> map = new HashMap<String, String>();
          map.put("id", postId.toString());
          requestBuilder.post(JumblrClient.blogPath(blogName, "/post/delete"), map);
      }
docs: Delete a given post
  @param blogName the name of the blog the post is in
  @param postId the id of the post to delete