remove reference to RDF 1.0

Author: TallTed

spec/index.html

@@ -1085,7 +1085,6 @@ <h2>RDF Datasets</h2>
       as RDF versions 1.1 and 1.2,
       in which the graph names of named graphs may be IRIs or blank nodes.
       In contrast, version 1.1 of the SPARQL Query Language [[SPARQL11-QUERY]]
-      and RDF version 1.0
       only allowed graph names to be IRIs.</p>
 
   </div>