OvmfPkg/XenAcpiPlatformDxe: remove OVMF's built-in ACPI tables

Xen is an advanced hypervisor; no Xen guest can function correctly without
the hypervisor's dynamically provided ACPI tables. Remove the built-in
(fallback) tables from XenAcpiPlatformDxe -- and the OvmfXen platform.

Remove any dependencies from XenAcpiPlatformDxe that are no longer needed.

Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Julien Grall <julien@xen.org>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2122
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20210526201446.12554-17-lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

OvmfPkg/OvmfXen.fdf

@@ -353,7 +353,6 @@ INF  OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
 
 INF  MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
 INF  OvmfPkg/XenAcpiPlatformDxe/XenAcpiPlatformDxe.inf
-INF  RuleOverride=ACPITABLE OvmfPkg/AcpiTables/AcpiTables.inf
 INF  MdeModulePkg/Universal/Acpi/S3SaveStateDxe/S3SaveStateDxe.inf
 INF  MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/BootScriptExecutorDxe.inf
 INF  MdeModulePkg/Universal/Acpi/BootGraphicsResourceTableDxe/BootGraphicsResourceTableDxe.inf
@@ -524,12 +523,6 @@ FILE FV_IMAGE = 9E21FD93-9C72-4c15-8C4B-E77F1DB2D792 {
     VERSION   STRING="$(INF_VERSION)" Optional BUILD_NUM=$(BUILD_NUMBER)
   }
 
-[Rule.Common.USER_DEFINED.ACPITABLE]
-  FILE FREEFORM = $(NAMED_GUID) {
-    RAW ACPI               |.acpi
-    RAW ASL                |.aml
-  }
-
 [Rule.Common.USER_DEFINED.CSM]
   FILE FREEFORM = $(NAMED_GUID) {
     RAW BIN                |.bin