autotest: Remove network_WiFiSecMat/018CheckWPA_CounterMeasures

This test looks interesting, but that's easy when you don't implement
any of the interesting methods.  The mentioned bug asks us to write a
test that actually exercises this functionality.

TEST=None
BUG=chromium:255246

Change-Id: I0d07a15f6353cb68cf5e52776ef580e315478998
Reviewed-on: https://gerrit.chromium.org/gerrit/60295
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Tan Gao <tgao@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
1 file changed