message: Remove the bazel clean that I added a while back.
diff: #
  # This script can be used by Jenkins parameterized / matrix builds.
  -# TODO(jhseu): Temporary for the gRPC pull request due to the
  -# protobuf -> protobuf_archive rename. Remove later.
  -TF_BUILD_BAZEL_CLEAN=1
  -
  # Helper function: Convert to lower case
  to_lower () {
  echo "$1" | tr '[:upper:]' '[:lower:]'
  