Remove pointer authentication test

This test only makes sure that the pointer authentication registers can
be read, which isn't a useful test now that the TFTF is going to support
using pointer authentication.

Change-Id: I01735677353ab08ba26f6faad1b900d98654c0d2
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
3 files changed