Revert "fix shellcheck failures of hack/verify-no-vendor-cycles.sh"

This reverts commit e25e5a63e7.

hack/.shellcheck_failures

@@ -28,6 +28,7 @@
 ./hack/pin-dependency.sh
 ./hack/test-integration.sh
 ./hack/update-vendor.sh
+./hack/verify-no-vendor-cycles.sh
 ./hack/verify-test-featuregates.sh
 ./test/cmd/batch.sh
 ./test/cmd/certificate.sh

hack/verify-no-vendor-cycles.sh

@@ -18,20 +18,16 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
 
 export GO111MODULE=auto
 
-staging_repos=()
-while IFS= read -r repo; do
-  staging_repos+=( "${repo}" )
-done < <(ls "${KUBE_ROOT}/staging/src/k8s.io/")
-
+staging_repos=($(ls "${KUBE_ROOT}/staging/src/k8s.io/"))
 staging_repos_pattern=$(IFS="|"; echo "${staging_repos[*]}")
 
 failed=false
-while IFS= read -r -d '' i; do
-  deps=$(go list -f '{{range .Deps}}{{.}}{{"\n"}}{{end}}' ./"$i" 2> /dev/null || echo "")
+for i in $(find vendor/ -type d); do
+  deps=$(go list -f '{{range .Deps}}{{.}}{{"\n"}}{{end}}' ./$i 2> /dev/null || echo "")
   deps_on_main=$(echo "${deps}" | grep -v "k8s.io/kubernetes/vendor/" | grep "k8s.io/kubernetes" || echo "")
   if [ -n "${deps_on_main}" ]; then
     echo "Package ${i} has a cyclic dependency on the main repository."
@@ -42,7 +38,7 @@ while IFS= read -r -d '' i; do
     echo "Package ${i} has a cyclic dependency on staging repository packages: ${deps_on_staging}"
     failed=true
   fi
-done < <(find vendor/ -type d)
+done
 
 if [[ "${failed}" == "true" ]]; then
   exit 1