[v0.15] Remove ineffective Renovate comments (#5057)

Helm and kubectl do not provide checksums in their GitHub release
assets, so Renovate cannot extract a digest for these entries.

Author: thardeck

.github/workflows/e2e-test-fleet-in-rancher.yml

@@ -107,18 +107,14 @@ jobs:
         run: |
           mkdir -p ~/.local/bin
           if [ "${{ steps.deps-cache.outputs.cache-hit }}" != "true" ]; then
-            # renovate: datasource=github-releases depName=kubernetes/kubernetes
             KUBECTL_VERSION="v1.35.3"
-            # renovate: datasource=github-release-attachments depName=kubernetes/kubernetes digestVersion=v1.35.3
             KUBECTL_SUM_amd64="fd31c7d7129260e608f6faf92d5984c3267ad0b5ead3bced2fe125686e286ad6"
             curl -sSfL "https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl" -o kubectl
             echo "${KUBECTL_SUM_amd64}  kubectl" | sha256sum -c -
             mv kubectl ~/.local/bin/
             chmod +x ~/.local/bin/kubectl
 
-            # renovate: datasource=github-releases depName=helm/helm
             HELM_VERSION="v4.1.3"
-            # renovate: datasource=github-release-attachments depName=helm/helm digestVersion=v4.1.3
             HELM_SUM_amd64="02ce9722d541238f81459938b84cf47df2fdf1187493b4bfb2346754d82a4700"
             curl -sSfL "https://get.helm.sh/helm-${HELM_VERSION}-linux-amd64.tar.gz" -o helm.tar.gz
             echo "${HELM_SUM_amd64}  helm.tar.gz" | sha256sum -c -