Remove NV_conservative_raster_underestimation from esext.php

extensions/esext.php

diff --git a/extensions/esext.php b/extensions/esext.php
index ae6bd70..4dbcb8a 100644
--- a/extensions/esext.php
+++ b/extensions/esext.php
@@ -617,6 +617,4 @@
 </li>
 <li value=297><a href="extensions/NV/NV_conservative_raster_pre_snap.txt">GL_NV_conservative_raster_pre_snap</a>
 </li>
-<li value=298><a href="extensions/NV/NV_conservative_raster_underestimation.txt">GL_NV_conservative_raster_underestimation</a>
-</li>
 </ol>