TF-M: we don't use Arm platforms binaries

remove binaries pulled from
https://releases.linaro.org/members/arm/platforms as TF-M CI isn't using
them.

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Change-Id: I5d70de79974e6d85c38df75b6e5986f778ab9969
1 file changed