Remove unused code in pkg/api/,pkg/apis/

pkg/apis/core/validation/validation.go

@@ -212,15 +212,6 @@ func ValidateOwnerReferences(ownerReferences []metav1.OwnerReference, fldPath *f
 // value that were not valid.  Otherwise this returns an empty list or nil.
 type ValidateNameFunc apimachineryvalidation.ValidateNameFunc
 
-// maskTrailingDash replaces the final character of a string with a subdomain safe
-// value if is a dash.
-func maskTrailingDash(name string) string {
-	if strings.HasSuffix(name, "-") {
-		return name[:len(name)-2] + "a"
-	}
-	return name
-}
-
 // ValidatePodName can be used to check whether the given pod name is valid.
 // Prefix indicates this name will be used as part of generation, in which case
 // trailing dashes are allowed.