OvmfPkg: remove handling of properties table

The UEFI properties table and the associated memory protection feature was
severely broken from the start, and has been deprecated for a while. Let's
drop all references to it from OVMF so we can safely remove it from the
DXE core as well.

Link: https://bugzilla.tianocore.org/show_bug.cgi?id=2633
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Jiewen Yao <Jiewen.yao@intel.com>
Acked-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

OvmfPkg/PlatformPei/Platform.c

@@ -315,7 +315,6 @@ NoexecDxeInitialization (
   VOID
   )
 {
-  UPDATE_BOOLEAN_PCD_FROM_FW_CFG (PcdPropertiesTableEnable);
   UPDATE_BOOLEAN_PCD_FROM_FW_CFG (PcdSetNxForStack);
 }