autotest: Remove tests that combine 802.11n with TKIP

This functionality is not required by the standard and not desirable to
support.

TEST=None
BUG=None

Change-Id: Iaae2c94b4f6f44cf87d43e37d86ba3b3b813952a
Reviewed-on: https://gerrit.chromium.org/gerrit/61128
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
6 files changed