Remove unneeded references to minor databases

h2/src/docsrc/html/features.html

@@ -378,16 +378,6 @@ H2 1.3,
 *15 Derby and H2 support <code>ROW_NUMBER() OVER()</code>.
 </p>
 
-<h3>DaffodilDb and One$Db</h3>
-<p>
-It looks like the development of this database has stopped. The last release was February 2006.
-</p>
-
-<h3>McKoi</h3>
-<p>
-It looks like the development of this database has stopped. The last release was August 2004.
-</p>
-
 <h2 id="products_work_with">H2 in Use</h2>
 <p>
 For a list of applications that work with or use H2, see: