docs: get rid of svn date keywords

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

docs/U-boot.html

@@ -20,7 +20,6 @@
 	usage and documentation by Ulf Samuelsson.
 	</p>
 
-	<p><small>$LastChangedDate: 2008-12-16 10:00:11 +0100 (tis, 16 dec 2008) $</small></p>
 	<ul>
 		<li><a href="#about">About U-Boot</a></li>
 		<li><a href="#at91rm9200dk">Board Support for AT91RM9200DK</a></li>

docs/buildroot.html

@@ -19,8 +19,6 @@
     usage and documentation by Thomas Petazzoni. Contributions from
     Karsten Kruse, Ned Ludd, Martin Herren and others. </p>
 
-    <p><small>$LastChangedDate$</small></p>
-
     <ul>
 
       <li><a href="#about">About Buildroot</a></li>