remove istio yaml vars since they do not exsit anymore
@@ -24,8 +24,6 @@ readonly SERVING_GKE_IMAGE=cos
# Public latest stable nightly images and yaml files.
readonly KNATIVE_BASE_YAML_SOURCE=https://storage.googleapis.com/knative-nightly/@/latest
-readonly KNATIVE_ISTIO_CRD_YAML=${KNATIVE_BASE_YAML_SOURCE/@/serving}/istio-crds.yaml
-readonly KNATIVE_ISTIO_YAML=${KNATIVE_BASE_YAML_SOURCE/@/serving}/istio.yaml
readonly KNATIVE_SERVING_RELEASE=${KNATIVE_BASE_YAML_SOURCE/@/serving}/serving.yaml
readonly KNATIVE_BUILD_RELEASE=${KNATIVE_BASE_YAML_SOURCE/@/build}/build.yaml
readonly KNATIVE_EVENTING_RELEASE=${KNATIVE_BASE_YAML_SOURCE/@/eventing}/release.yaml
