def delete(url)
      parameters = Specification.new(url: Types::URL).parameters(url: url)
      @client.action('/posts/delete', parameters)
      self
    end
def delete(url)
      parameters = Specification.new(url: Types::URL).parameters(url: url)
      @client.action('/posts/delete', parameters)
      self
    end
Delete a bookmark

 @example
   posts.delete(url)

 @param [String] url
   the URL of the bookmark to delete

 @return [self]

 @api public

 @see https://pinboard.in/api/#posts_delete