empty forbiddenPrefixes is same as not being there at all

Author: spiffxp

pkg/kubectl/.import-restrictions

@@ -66,4 +66,3 @@ rules:
       - k8s.io/kubernetes/pkg/registry/rbac/reconciliation
       - k8s.io/kubernetes/pkg/registry/rbac/validation
       - k8s.io/kubernetes/pkg/util/parsers
-    forbiddenPrefixes: []