Remove bogus file in arch/x86_64/pci

This was a backup file that somehow made it into the official
tree. Never used for anything. Remove.

Signed-off-by: Andi Kleen <ak@suse.de>

Index: linux/arch/x86_64/pci/Makefile-BUS
===================================================================
--- linux.orig/arch/x86_64/pci/Makefile-BUS
+++ /dev/null
@@ -1,22 +0,0 @@
-#
-# Makefile for X86_64 specific PCI routines
-#
-# Reuse the i386 PCI subsystem
-#
-CFLAGS += -I arch/i386/pci
-
-obj-y		:= i386.o
-obj-$(CONFIG_PCI_DIRECT)+= direct.o
-obj-y		+= fixup.o
-obj-$(CONFIG_ACPI)	+= acpi.o
-obj-y			+= legacy.o irq.o common.o
-# mmconfig has a 64bit special
-obj-$(CONFIG_PCI_MMCONFIG) += mmconfig.o
-
-direct-y += ../../i386/pci/direct.o
-acpi-y   += ../../i386/pci/acpi.o
-legacy-y += ../../i386/pci/legacy.o
-irq-y    += ../../i386/pci/irq.o
-common-y += ../../i386/pci/common.o
-fixup-y  += ../../i386/pci/fixup.o
-i386-y  += ../../i386/pci/i386.o