From time to time unwanted pages can appear in Google Search Results. Could be a temporary page, old content or even a test page that’s made its way onto Google’s rankings.
When using a CMS like WordPress or Magento pages can get mistakenly submitted to serach engines, even if they are not linked to by other pages. This is because CMSes build sitemaps to help Google and other search engines properly index a website.
If a page from your website has been included by mistake you can request Google remove it from their results.
If everything checks out, the link should be dropped from Google Search results within 2-6 hours.