[C2y] Remove WG14 N3459 from the C status page

Only changes 1 and 2 were adopted in Graz and those are both editorial
changes which don't impact the behavior of compilers, so there's no
need to track this paper.

Author: AaronBallman

clang/www/c_status.html

@@ -265,12 +265,6 @@ <h2 id="c2y">C2y implementation status</h2>
       <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3363.pdf">N3363</a></td>
       <td class="unknown" align="center">Unknown</td>
 	</tr>
-    <tr>
-      <td>Integer and arithmetic constant expressions, v. 2</td>
-      <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3459.pdf">N3459</a></td>
-      <!-- first and second change only -->
-      <td class="unknown" align="center">Unknown</td>
-	</tr>
     <tr>
       <td>Preprocessor integer expressions, v. 2</td>
       <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3505.pdf">N3505</a></td>