Remove obsolete TARGET_AUX_OS_VARIANT_LIST

Test: treehugger
Change-Id: Icbf0ad9b30c1646e9558a5fc3316a07746cc6ef5
diff --git a/BoardConfigCommon.mk b/BoardConfigCommon.mk
index 12f9dac..a5ab322 100644
--- a/BoardConfigCommon.mk
+++ b/BoardConfigCommon.mk
@@ -38,8 +38,6 @@
 
 TARGET_USES_HWC2 := true
 
-TARGET_AUX_OS_VARIANT_LIST := none
-
 BOARD_SEPOLICY_DIRS += device/linaro/hikey/sepolicy
 BOARD_SEPOLICY_DIRS += system/bt/vendor_libs/linux/sepolicy