fix warnings

Author: mkumatag

images/gcb-docker-gcloud/Dockerfile

@@ -12,9 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-ARG GO_VERSION
+ARG GO_VERSION=1.22.9
 
-FROM multiarch/qemu-user-static:7.2.0-1 as qemu-image
+FROM multiarch/qemu-user-static:7.2.0-1 AS qemu-image
 
 # Includes bash, docker, and gcloud
 FROM golang:${GO_VERSION}-alpine

images/gcb-docker-gcloud/cloudbuild.yaml

@@ -4,7 +4,6 @@ steps:
       - build
       - --tag=gcr.io/$PROJECT_ID/gcb-docker-gcloud:$_GIT_TAG
       - --build-arg=IMAGE_ARG=gcr.io/$PROJECT_ID/gcb-docker-gcloud:$_GIT_TAG
-      - --build-arg=GO_VERSION=$_GO_VERSION
       - .
     dir: images/gcb-docker-gcloud/
   - name: gcr.io/cloud-builders/docker
@@ -14,7 +13,6 @@ steps:
     - gcr.io/$PROJECT_ID/gcb-docker-gcloud:latest
 substitutions:
   _GIT_TAG: '12345'
-  _GO_VERSION: 1.22.9
 images:
   - 'gcr.io/$PROJECT_ID/gcb-docker-gcloud:$_GIT_TAG'
   - 'gcr.io/$PROJECT_ID/gcb-docker-gcloud:latest'