Tweak the build_docker_image.sh script by removing references to MET_…

…BASE_IMAGE and MET_BASE_TAG since those variables are hard-coded in the Dockerfiles themselves and this script includes no logic to handle them.

.github/jobs/build_docker_image.sh

@@ -9,9 +9,7 @@ DOCKERFILE_PATH=${GITHUB_WORKSPACE}/internal/scripts/docker/Dockerfile.copy
 CMD_LOGFILE=${GITHUB_WORKSPACE}/docker_build.log
 
 time_command docker build -t ${DOCKERHUB_TAG} \
-    --build-arg SOURCE_BRANCH \
-    --build-arg MET_BASE_REPO \
-    --build-arg MET_BASE_TAG \
+    --build-arg SOURCE_BRANCH=${SOURCE_BRANCH} \
     -f $DOCKERFILE_PATH ${GITHUB_WORKSPACE}
 if [ $? != 0 ]; then
   cat ${GITHUB_WORKSPACE}/docker_build.log