Merge pull request kubernetes#61099 from hanxiaoshuai/cleanup0313

Automatic merge from submit-queue (batch tested with PRs 60519, 61099, 61218, 61166, 61714). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

remove unused func NewNamespacedNameFromString

**What this PR does / why we need it**:
remove unused func NewNamespacedNameFromString since v1.8.0
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Author: Kubernetes Submit Queue

staging/src/k8s.io/apimachinery/pkg/types/namespacedname.go

@@ -18,7 +18,6 @@ package types
 
 import (
 	"fmt"
-	"strings"
 )
 
 // NamespacedName comprises a resource name, with a mandatory namespace,
@@ -42,19 +41,3 @@ const (
 func (n NamespacedName) String() string {
 	return fmt.Sprintf("%s%c%s", n.Namespace, Separator, n.Name)
 }
-
-// NewNamespacedNameFromString parses the provided string and returns a NamespacedName.
-// The expected format is as per String() above.
-// If the input string is invalid, the returned NamespacedName has all empty string field values.
-// This allows a single-value return from this function, while still allowing error checks in the caller.
-// Note that an input string which does not include exactly one Separator is not a valid input (as it could never
-// have neem returned by String() )
-func NewNamespacedNameFromString(s string) NamespacedName {
-	nn := NamespacedName{}
-	result := strings.Split(s, string(Separator))
-	if len(result) == 2 {
-		nn.Namespace = result[0]
-		nn.Name = result[1]
-	}
-	return nn
-}