Remove Sparkle notes from release notes

docs/ReleaseNotes.html

@@ -14,7 +14,6 @@ <h3>Release Notes for v2.6</h3>
 <ul>
 <li>Add <code>hexf</code> command line tool, which can be installed via the menu Hex Fiend > Install Command Line Tool. This is a simpler convience wrapper around the <code>open</code> command.
 <li>Fix showing the last line number with certain fonts (thanks Daniele Cattaneo!)</li>
-<li>Update Sparkle to 1.17.0</li>
 </ul>
 
 <h3>Release Notes for v2.5</h3>
@@ -24,7 +23,6 @@ <h3>Release Notes for v2.5</h3>
 <li>Remove File Format option when saving</li>
 <li>Fix broken read-only mode</li>
 <li>Fix error messages not showing when files can't be opened</li>
-<li>Update Sparkle to 1.16.0</li>
 </ul>
 
 <h3>Release Notes for v2.4</h3>
@@ -34,7 +32,6 @@ <h3>Release Notes for v2.4</h3>
 <li>Added text encodings table</li>
 <li>Allow selecting packages and hidden files</li>
 <li>Fixed many bugs and memory leaks</li>
-<li>Update Sparkle to 1.14.0</li>
 </ul>
 
 <h3>Release Notes for v2.1.2</h3>