remove kubelet scrapes for 5k nodes dra job

Signed-off-by: Alay Patel <alayp@nvidia.com>

Author: alaypatel07

config/jobs/kubernetes/sig-scalability/DRA/sig-scalability-periodic-dra.yaml

@@ -599,8 +599,6 @@ periodics:
           value: "nftables"
         - name: ENABLE_PROMETHEUS_SERVER
           value: "true"
-        - name: PROMETHEUS_SCRAPE_KUBELETS
-          value: "true"
         - name: PROMETHEUS_PVC_STORAGE_CLASS
           value: "ssd-csi"
         - name: CLOUD_PROVIDER