device: Drop unused HyperTransport code

Only two definitions are actually used somewhere, the rest is unused.

Change-Id: Iec52d0d47fce6a1ec5455b670824b995a7a34a4c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47407
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/device/Makefile.inc

@@ -35,7 +35,6 @@ postcar-y += pci_ops.c
 ramstage-y += pci_ops.c
 smm-y += pci_ops.c
 
-ramstage-$(CONFIG_HYPERTRANSPORT_PLUGIN_SUPPORT) += hypertransport.c
 ramstage-$(CONFIG_PCIX_PLUGIN_SUPPORT) += pcix_device.c
 ramstage-$(CONFIG_PCIEXP_PLUGIN_SUPPORT) += pciexp_device.c
 ramstage-$(CONFIG_CARDBUS_PLUGIN_SUPPORT) += cardbus_device.c