Remove useless delete pvc scripts (#18416)

Signed-off-by: NJenny Li <jing.li@zilliz.com>

tests/scripts/uninstall_milvus.sh

@@ -78,27 +78,4 @@ MILVUS_LABELS2="release=${MILVUS_HELM_RELEASE_NAME}"
 
 # Clean up pvc
 kubectl delete pvc --wait -n "${MILVUS_HELM_NAMESPACE}" $(kubectl get pvc -n "${MILVUS_HELM_NAMESPACE}" -l "${MILVUS_LABELS1}" -o jsonpath='{range.items[*]}{.metadata.name} ') || true
-kubectl delete pvc --wait -n "${MILVUS_HELM_NAMESPACE}" $(kubectl get pvc -n "${MILVUS_HELM_NAMESPACE}" -l "${MILVUS_LABELS2}" -o jsonpath='{range.items[*]}{.metadata.name} ') || true
-
-# Add check & delete pvc again in case pvc need time to be deleted 
-clean_label_pvc(){
-    local label=${1?label expected as first argument.}
-
-    for i in {1..10}
-    do
-        PVC=$(kubectl get pvc -n "${MILVUS_HELM_NAMESPACE}" -l "${label}" -o jsonpath='{range.items[*]}{.metadata.name} ')
-        STATUS=$(echo ${PVC} | wc -w )
-        echo "status is ${STATUS}"
-        if [ $STATUS == 0 ]; then
-            break
-        else
-            sleep 5
-            echo "PVCs are ${PVC}"
-            kubectl delete pvc --wait -n "${MILVUS_HELM_NAMESPACE}" ${PVC}
-        fi
-    done
-}
-
-echo "Check & Delete Persistent Volumes"
-clean_label_pvc ${MILVUS_LABELS1}
-clean_label_pvc ${MILVUS_LABELS2}
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+kubectl delete pvc --wait -n "${MILVUS_HELM_NAMESPACE}" $(kubectl get pvc -n "${MILVUS_HELM_NAMESPACE}" -l "${MILVUS_LABELS2}" -o jsonpath='{range.items[*]}{.metadata.name} ') || true
\ No newline at end of file