<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def remove_link(self, rel, value=None, href=None):
 """ Removes link nodes based on the function arguments. This can remove link nodes based on the following combinations of arguments: link/@rel link/@rel & link/text() link/@rel & link/@href link/@rel & link/text() & link/@href :param rel: link/@rel value to remove. Required. :param value: link/text() value to remove. This is used in conjunction with link/@rel. :param href: link/@href value to remove. This is used in conjunction with link/@rel. :return: Return the number of link nodes removed, or False if no nodes are removed. """

        links_node = self.metadata.find('links')
        if links_node is None:
            log.warning('No links node present')
            return False
        counter = 0
        links = links_node.xpath('.//link[@rel="{}"]'.format(rel))
        for link in links:
            if value and href:
                if link.text == value and link.attrib['href'] == href:
                    links_node.remove(link)
                    counter += 1
            elif value and not href:
                if link.text == value:
                    links_node.remove(link)
                    counter += 1
            elif not value and href:
                if link.attrib['href'] == href:
                    links_node.remove(link)
                    counter += 1
            else:
                links_node.remove(link)
                counter += 1
        return counter