device: grouper: Synchornize button mapping and cleanup KBC layout

Change-Id: I498c6b5d5cac8c317d7e28a1d2a8707b099ce837
Signed-off-by: paris_yeh <paris_yeh@asus.com>
diff --git a/device-common.mk b/device-common.mk
index 280a196..0072d31 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -67,8 +67,7 @@
     device/asus/grouper/elan-touchscreen.idc:system/usr/idc/elan-touchscreen.idc \
     device/asus/grouper/raydium_ts.idc:system/usr/idc/raydium_ts.idc \
     device/asus/grouper/sensor00fn11.idc:system/usr/idc/sensor00fn11.idc \
-    device/asus/grouper/gpio-keys.kl:system/usr/keylayout/gpio-keys.kl \
-    device/asus/grouper/tegra-kbc.kl:system/usr/keylayout/tegra-kbc.kl
+    device/asus/grouper/gpio-keys.kl:system/usr/keylayout/gpio-keys.kl
 
 PRODUCT_PACKAGES := \
     lights.grouper \