Remove vim modelines from all files

If you want modelines use my vim plugin:
https://github.com/cryptomilk/git-modeline.vim

git config --add vim.modeline "ts=4 sw=4 et"

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

src/session.c

@@ -958,5 +958,3 @@ void ssh_set_counters(ssh_session session, ssh_counter scounter,
 }
 
 /** @} */
-
-/* vim: set ts=4 sw=4 et cindent: */