update year

also remove some stale comments

Author: vladak

intro.tex

@@ -10,13 +10,8 @@
 \date{Version: \rm\today}
 \maketitle
 
-% \v{c} - hacek nad c
-% \'{y} - carka nad y
-% \'{\i} - carka nad i (\i je treba proto, aby nam zmizela tecka nad i)
-% \accent23o{u} - krouzek nad u samozrejme
-
 \vspace{2ex}
-{\small (c) 2011 -- 2022 Vladim\'{i}r Kotal}\\
+{\small (c) 2011 -- 2023 Vladim\'{i}r Kotal}\\
 {\small (c) 2005 -- 2011, 2016 -- 2022 Jan Pechanec}\\
 {\small (c) 1999 -- 2004 Martin Beran}