Merge pull request kubernetes#51447 from sakeven/rm_useless_code

Automatic merge from submit-queue. 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 useless code

Signed-off-by: sakeven <[email protected]>



**What this PR does / why we need it**:

Function checkErrWithPrefix is never used, so we can safely remove it.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```
NONE
```

pkg/kubectl/cmd/util/helpers.go

@@ -120,11 +120,6 @@ func CheckErr(err error) {
  checkErr(err, fatalErrHandler)
 }
 
-// checkErrWithPrefix works like CheckErr, but adds a caller-defined prefix to non-nil errors
-func checkErrWithPrefix(prefix string, err error) {
- checkErr(err, fatalErrHandler)
-}
-
 // checkErr formats a given error as a string and calls the passed handleErr
 // func with that string and an kubectl exit code.
 func checkErr(err error, handleErr func(string, int)) {
@@ -578,7 +573,7 @@ func ChangeResourcePatch(info *resource.Info, changeCause string) ([]byte, types
  }
 }
 
-// containsChangeCause checks if input resource info contains change-cause annotation.
+// ContainsChangeCause checks if input resource info contains change-cause annotation.
 func ContainsChangeCause(info *resource.Info) bool {
  annotations, err := info.Mapping.MetadataAccessor.Annotations(info.Object)
  if err != nil {