skylab_suite: Drop unsupported command line flag

Let's not give false hopes, eh?

BUG=chromium:887580
TEST=None

Change-Id: If6b16abb65a9ba08b09854ce9e9f094c6c022858
Reviewed-on: https://chromium-review.googlesource.com/1246743
Commit-Ready: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/venv/skylab_suite/suite_parser.py b/venv/skylab_suite/suite_parser.py
index 7c6a29e..4cf517f 100644
--- a/venv/skylab_suite/suite_parser.py
+++ b/venv/skylab_suite/suite_parser.py
@@ -82,9 +82,6 @@
 
     # Swarming-related parameters.
     parser.add_argument(
-        '--swarming', default=None,
-        help='The swarming server to call.')
-    parser.add_argument(
         '--execution_timeout_seconds', type=int, default=30,
         help='Seconds to allow a task to complete, once execution beings.')