I had a site with multiple blogs for eg www.mysite.com/gre, www.mysite.com/gmat
What I have done is that ported the blogs to new site mynessite.com and set up a 301 redirect. The old content becomes the part of sitemap.xml for new site. Should I delete the site map for www.mysite.com/gre, www.mysite.com/gmat from my old blog ?