[wwwdocs] Remove broken Intel AVX-512 reference from svn.html

[Gerald Pfeifer]

Once again, corporate webmaster (not) at work.

Committed.

(Kirill, if you want to add a new link, absolutely go ahead.)

Gerald

Index: svn.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/svn.html,v
retrieving revision 1.202
diff -u -r1.202 svn.html
--- svn.html    27 Aug 2015 19:47:19 -0000      1.202
+++ svn.html    14 Nov 2015 22:17:35 -0000
@@ -381,8 +381,7 @@
 
   <dt>avx512</dt>
   <dd>The goal of this branch is to implement Intel AVX-512 and SHA
-  Programming Reference
-  (<a 
href="http://download-software.intel.com/sites/default/files/319433-015.pdf";>link</a>).
+  Programming Reference.
   The branch is maintained by Yukhin Kirill &lt;<a
   href="mailto:kirill.yuk...@intel.com";>kirill.yuk...@intel.com</a>&gt;.
   Patches should be marked with the tag <code>[AVX512]</code> in the subject