The only remaining user of ArmPlatformSysConfigLib has absorbed this definition into its own edk2-platforms package, so let's remove it from the shared code. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>