fix gke-cluster script

Author: salonichf5

tests/scripts/create-gke-cluster.sh

@@ -16,8 +16,7 @@ gcloud container clusters create ${GKE_CLUSTER_NAME} \
     --master-ipv4-cidr 172.16.${ip_random_digit}.32/28 \
     --metadata=block-project-ssh-keys=TRUE \
     --monitoring=SYSTEM,POD,DEPLOYMENT \
-    --logging=SYSTEM,WORKLOAD \
-    --num-nodes=25
+    --logging=SYSTEM,WORKLOAD
 
 # Add current IP to GKE master control node access, if this script is not invoked during a CI run.
 if [ "${IS_CI}" = "false" ]; then