remove outdated comment, fixes #4240

src/borg/archiver.py

@@ -5197,7 +5197,6 @@ class Archiver:
         return result
 
     def parse_args(self, args=None):
-        # We can't use argparse for "serve" since we don't want it to show up in "Available commands"
         if args:
             args = self.preprocess_args(args)
         parser = self.build_parser()