Removed getty serial prompt on boot.

Author: kei

board/raspberrypi0w/configs/raspberrypi0w_defconfig

@@ -446,17 +446,7 @@ BR2_SYSTEM_BIN_SH_BUSYBOX=y
 # BR2_SYSTEM_BIN_SH_MKSH is not set
 # BR2_SYSTEM_BIN_SH_ZSH is not set
 # BR2_SYSTEM_BIN_SH_NONE is not set
-BR2_TARGET_GENERIC_GETTY=y
-BR2_TARGET_GENERIC_GETTY_PORT="console"
-BR2_TARGET_GENERIC_GETTY_BAUDRATE_KEEP=y
-# BR2_TARGET_GENERIC_GETTY_BAUDRATE_9600 is not set
-# BR2_TARGET_GENERIC_GETTY_BAUDRATE_19200 is not set
-# BR2_TARGET_GENERIC_GETTY_BAUDRATE_38400 is not set
-# BR2_TARGET_GENERIC_GETTY_BAUDRATE_57600 is not set
-# BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200 is not set
-BR2_TARGET_GENERIC_GETTY_BAUDRATE="0"
-BR2_TARGET_GENERIC_GETTY_TERM="vt100"
-BR2_TARGET_GENERIC_GETTY_OPTIONS=""
+# BR2_TARGET_GENERIC_GETTY is not set
 BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW=y
 BR2_SYSTEM_DHCP=""
 BR2_SYSTEM_DEFAULT_PATH="/bin:/sbin:/usr/bin:/usr/sbin"