autotest: Remove network_WiFiSecMat

The remaining test (119CheckWPA_1x_AES_w_TPM) is a duplicate of a test
that has already been moved over to the new framework.  All migrated
802.1x tests use the TPM, which eliminates the need for an explicit TPM
test case.

Without that test, there is no need for a SecMat test.

BUG=chromium:256351
TEST=None

Change-Id: Ic867031a45d2ad49426ec1ba48f72b7cb28876bf
Reviewed-on: https://gerrit.chromium.org/gerrit/62135
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
3 files changed