fix(boot): silence shellcheck complaints

Author: mboersma

rootfs/bin/boot

@@ -28,7 +28,7 @@ sleep $((ETCD_TTL+1))
 
 function etcd_set_default {
 	set +e
-	ERROR="$(etcdctl --no-sync -C "$ETCD" mk "$ETCD_PATH/$1" "$2" 2>&1 >/dev/null)"
+	ERROR="$(etcdctl --no-sync -C "$ETCD" mk "$ETCD_PATH/$1" "$2" 2>&1)"
 	if [[ $? -ne 0 ]] && echo "$ERROR" | grep -iqve "key already exists"; then
 		echo "etcd_set_default: an etcd error occurred ($ERROR)"
 		echo "aborting..."
@@ -39,7 +39,7 @@ function etcd_set_default {
 
 function etcd_safe_mkdir {
 	set +e
-	ERROR="$(etcdctl --no-sync -C "$ETCD" mkdir "$1" 2>&1 >/dev/null)"
+	ERROR="$(etcdctl --no-sync -C "$ETCD" mkdir "$1" 2>&1)"
 
 	if [[ $? -ne 0 ]] && echo "$ERROR" | grep -iqve "key already exists"; then
 		echo "etcd_safe_mkdir: an etcd error occurred ($ERROR)"