hack/verify-pkg-names.sh: remove k8s.io/metrics dirs

hack/verify-pkg-names.sh

@@ -26,7 +26,7 @@ source "${KUBE_ROOT}/hack/lib/init.sh"
 kube::golang::verify_go_version
 
 cd "${KUBE_ROOT}"
-if git --no-pager grep -E $'^(import |\t)[a-z]+[A-Z_][a-zA-Z]* "[^"]+"$' -- '**/*.go' ':(exclude)vendor/*' ':(exclude)staging/src/k8s.io/metrics/*' ; then
+if git --no-pager grep -E $'^(import |\t)[a-z]+[A-Z_][a-zA-Z]* "[^"]+"$' -- '**/*.go' ':(exclude)vendor/*'; then
   echo "!!! Some package aliases break go conventions."
   echo "To fix these errors, do not use capitalized or underlined characters"
   echo "in pkg aliases. Refer to https://blog.golang.org/package-names for more info."