No longer used variable.

As the database name from the navigation frame was dropped, this is
useless.

Documentation.html

@@ -1803,11 +1803,6 @@ $cfg['TrustedProxies'] =
     <dd>The style used for the pointer in the navi frame.
         See <tt>themes/themename/layout.inc.php</tt>.</dd>
 
-    <dt id="cfg_NaviDatabaseNameColor">$cfg['NaviDatabaseNameColor'] string [CSS color]<br />
-    </dt>
-    <dd>The color used for the database name in the navi frame.
-    See <tt>themes/themename/layout.inc.php</tt>.</dd>
-
     <dt id="cfg_LeftPointerEnable">$cfg['LeftPointerEnable'] boolean</dt>
     <dd>A value of <tt>TRUE</tt> activates the navi pointer (when LeftFrameLight
         is <tt>FALSE</tt>).</dd>