cml-u: Remove unused TBT ACPI code

Change-Id: Iade0316d76f2bd1fb037fcdb18e7d81f3b6fdbb0

src/mainboard/system76/cml-u/acpi/mainboard.asl

@@ -22,5 +22,3 @@ Scope (\_SB) {
 Scope (\_GPE) {
 	#include "gpe.asl"
 }
-
-#include "tbt.asl"

src/mainboard/system76/cml-u/acpi/tbt.asl

@@ -1,29 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-// See https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports
-Scope(\_SB.PCI0.RP05) {
-    Method(_DSD, 0, NotSerialized) {
-        Return (Package(4) {
-            // https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports#identifying-pcie-root-ports-supporting-hot-plug-in-d3
-            ToUUID("6211e2c0-58a3-4af3-90e1-927a4e0c55a4"),
-            Package(1) {
-                Package(2) {
-                    "HotPlugSupportInD3",
-                    1
-                }
-            },
-            // https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports#identifying-externally-exposed-pcie-root-ports
-            ToUUID("efcc06cc-73ac-4bc3-bff0-76143807c389"),
-            Package(2) {
-                Package(2) {
-                    "ExternalFacingPort",
-                    1
-                },
-                Package(2) {
-                    "UID",
-                    0
-                }
-            }
-        })
-    }
-}