options: remove unused 'exe' parameter

The 'exe' parameter was added in the hope of using it for additional
contextual information in the help text that Options generates. It was
till then abandoned and was judged as superflous information.

Remove the 'exe' parameter from Options' constructor.

(copied from the 'bup' project)
Signed-off-by: Gabriel Filion <lelutin@gmail.com>

main.py

@@ -68,7 +68,7 @@ server     (internal use only)
 firewall   (internal use only)
 hostwatch  (internal use only)
 """
-o = options.Options('sshuttle', optspec)
+o = options.Options(optspec)
 (opt, flags, extra) = o.parse(sys.argv[1:])
 
 if opt.daemon:

options.py

@@ -76,9 +76,8 @@ class Options:
     By default, the parser function is getopt.gnu_getopt, and the abort
     behaviour is to exit the program.
     """
-    def __init__(self, exe, optspec, optfunc=getopt.gnu_getopt,
+    def __init__(self, optspec, optfunc=getopt.gnu_getopt,
                  onabort=_default_onabort):
-        self.exe = exe
         self.optspec = optspec
         self._onabort = onabort
         self.optfunc = optfunc