[e] (0) Remove redundant requirements for <link rel=stylesheet> handling
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24295
Affected topics: CSS, HTML

git-svn-id: http://svn.whatwg.org/webapps@8398 340c8d12-0b0e-0410-8428-c7bf67bfef74