Remove unused jQuery script.

Author: davidlehn

index.html

@@ -8,8 +8,6 @@
       For the three scripts below, if your spec resides on dev.w3 you can check them
       out in the same tree and use relative links so that they'll work offline,
      -->
-    <script class="remove"
-      src="https://unpkg.com/browse/jquery/dist/jquery.min.js"></script>
     <script src='https://www.w3.org/Tools/respec/respec-w3c' class='remove'></script>
     <script src="./common.js" class="remove"></script>
     <script class="remove"