Add a presentation for 25.7

Author: alexey-milovidov

2025-release-25.7/.index.html.kate-swp

@@ -593,10 +593,6 @@ <h2>More Features For Iceberg</h2>
 
 <p style="color: gray; font-size: 14pt; margin-top: 1em;">Developer: Konstantin Vedernikov.</p>
 
-<p>Support for reading tables with <b>positional deletes</b>.</p>
-
-<p style="color: gray; font-size: 14pt; margin-top: 1em;">Developer: Yanghong Zhong.</p>
-
 <p>Support for <b>compressed</b> metadata.json files.</p>
 
 <p style="color: gray; font-size: 14pt; margin-top: 1em;">Developer: Alexander Sapin.</p>