clone.sh: Do not parse psa arch tests version from CMake

With TF-M split build feature, psa arch tests version is no more
specified in CMake configs. So do not parse it from CMake any more.
Using the one fixed by Jenkins configs is good enough.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ib649783198402836b442cc28acb93332a24c120b
1 file changed