title: sharepoint content type migration
body: <p>Some times ago company intranet has been migrated from SP2010 to 2013</p>
  
  <p>Now when we are creating a new site collections it is always contains content type from the old SP2010. 
  And we can't remove them, 
  powershel cant even get any details about it.</p>
  
  <p>Any ideas?</p>