Update spec/index.html

Co-authored-by: Andy Seaborne <[email protected]>

Author: pchampin

spec/index.html

@@ -272,7 +272,6 @@ <h3>RDF Vocabularies and Namespace IRIs</h3>
       a common substring known as a <dfn>namespace IRI</dfn>.
       Some namespace IRIs are associated by convention with a short name
       known as a <dfn>namespace prefix</dfn>.
-      The table below provides some examples.
 
     <table id="tab-vocab-ns" class="simple">
       <caption>Some namespace prefixes and IRIs used in this specification</caption>