setup_board: Hide expanded binhost options.

BUG=b:187795483
TEST=setup_board -h

Cq-Depend: chromium:2757488
Change-Id: I517d841806cbc8647592922cc32e5e406329704e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2757767
Tested-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Alex Klein <saklein@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/setup_board.py b/scripts/setup_board.py
index 0e753d2..f0c8d04 100644
--- a/scripts/setup_board.py
+++ b/scripts/setup_board.py
@@ -101,19 +101,12 @@
                      deprecated=deprecated % '--reuse-pkgs-from-local-boards',
                      help='Deprecated form of --reuse-pkgs-from-local-boards.')
 
-  experimental = parser.add_argument_group('Experimental Options')
-  experimental.add_argument(
-      '--more-binhosts',
-      dest='expanded_binhost_inheritance',
-      default=True,
-      action='store_true',
-      help=argparse.SUPPRESS)
-  experimental.add_argument(
+  parser.add_argument(
       '--fewer-binhosts',
       dest='expanded_binhost_inheritance',
       default=True,
       action='store_false',
-      help='Do not try to include any additional binhosts.')
+      help=argparse.SUPPRESS)
 
   return parser