Update limitedByDefault() which does not return error

plugin/pkg/admission/resourcequota/controller.go

@@ -342,8 +342,8 @@ func filterLimitedResourcesByGroupResource(input []resourcequotaapi.LimitedResou
 	return result
 }
 
-// limitedByDefault determines from the specfified usage and limitedResources the set of resources names
-// that must be present in a covering quota.  It returns an error if it was unable to determine if
+// limitedByDefault determines from the specified usage and limitedResources the set of resources names
+// that must be present in a covering quota.  It returns empty set if it was unable to determine if
 // a resource was not limited by default.
 func limitedByDefault(usage api.ResourceList, limitedResources []resourcequotaapi.LimitedResource) []api.ResourceName {
 	result := []api.ResourceName{}
@@ -365,7 +365,7 @@ func limitedByDefault(usage api.ResourceList, limitedResources []resourcequotaap
 }
 
 // checkRequest verifies that the request does not exceed any quota constraint. it returns a copy of quotas not yet persisted
-// that capture what the usage would be if the request succeeded.  It return an error if the is insufficient quota to satisfy the request
+// that capture what the usage would be if the request succeeded.  It return an error if there is insufficient quota to satisfy the request
 func (e *quotaEvaluator) checkRequest(quotas []api.ResourceQuota, a admission.Attributes) ([]api.ResourceQuota, error) {
 	namespace := a.GetNamespace()
 	evaluators := e.registry.Evaluators()