Remove unused code

Signed-off-by: mantuliu <240951888@qq.com>

Kubernetes-commit: bc70548c470983b2299a6d29add41ea81f676d92

pkg/endpoints/discovery/storageversionhash.go

@@ -27,9 +27,6 @@ import (
 // this function.
 func StorageVersionHash(group, version, kind string) string {
 	gvk := group + "/" + version + "/" + kind
-	if gvk == "" {
-		return ""
-	}
 	bytes := sha256.Sum256([]byte(gvk))
 	// Assuming there are N kinds in the cluster, and the hash is X-byte long,
 	// the chance of colliding hash P(N,X) approximates to 1-e^(-(N^2)/2^(8X+1)).