mb/winnet/g170: Drop AMD car.h file from Via mainboard

08f7d1ae0d ("mainboard/via*: Drop AMD car.h file") did the same for all
Via mainboards that were in tree at that time, but the winnet/g170 was
merged a bit later.

Change-Id: Iedb33f4c2fce6fc2cf2669fee4ffb25bf793c92b
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/21343
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/mainboard/winnet/g170/romstage.c

@@ -23,7 +23,6 @@
 #include <console/console.h>
 #include <northbridge/via/cn700/raminit.h>
 #include <cpu/x86/bist.h>
-#include <cpu/amd/car.h>
 #include <delay.h>
 #include <lib.h>
 #include <spd.h>