upload_file_to_datastore: Don't define duplicate -S flag (vmware#387)

Change 36e5579 introduced a '--disable_ssl_verification' flag in the
common argument definitions in tools.cli. By specifying it in the
upload_file_to_datastore script as well, the script will raise an
exception about "conflicting option string(s)" at startup. We don't need
it defined twice, so we can safely remove it from the
upload_file_to_datastore script.

samples/upload_file_to_datastore.py

@@ -25,10 +25,6 @@ def get_args():
                         required=True,
                         action='store',
                         help='Path on datastore to place file')
-    parser.add_argument('-S', '--disable_ssl_verification',
-                        required=False,
-                        action='store_true',
-                        help='Disable ssl host certificate verification')
     args = parser.parse_args()
 
     return cli.prompt_for_password(args)