gpu: host1x: Remove unused Makefile

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/host1x/hw/Makefile

@@ -1,6 +0,0 @@
-ccflags-y = -Idrivers/gpu/host1x
-
-host1x-hw-objs  = \
-	host1x01.o
-
-obj-$(CONFIG_TEGRA_HOST1X) += host1x-hw.o