removed outdated comment;

--- a/doc-src/isar.sty	Fri May 09 23:20:43 2008 +0200
+++ b/doc-src/isar.sty	Fri May 09 23:21:33 2008 +0200
@@ -1,8 +1,5 @@
 
 %% $Id$
-%%
-%% Isar language elements
-%%
 
 \usepackage{ifthen}