Platform/ARM/VExpressPkg: Remove redundant traditional ACPI support

Dynamic Tables Framework enables unification of the firmware
for FVP_Base_AEMv8A-AEMv8A and FVP_Base_RevC-2xAEMv8A models
such that the same firmware binary can be used by both models.

A single firmware binary cannot be supported using the traditional
ACPI tables. Therefore, remove support for the now redundant
traditional ACPI tables.

Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>