Merge pull request #55576 from miaoyq/using-sort.slice

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>.

Simplify the sorting codes

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

**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

```

pkg/kubectl/util/slice/slice.go

@@ -20,13 +20,5 @@ import (
 	"sort"
 )
 
-// Int64Slice attaches the methods of Interface to []int64,
-// sorting in increasing order.
-type Int64Slice []int64
-
-func (p Int64Slice) Len() int           { return len(p) }
-func (p Int64Slice) Less(i, j int) bool { return p[i] < p[j] }
-func (p Int64Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
-
 // Sorts []int64 in increasing order
-func SortInts64(a []int64) { sort.Sort(Int64Slice(a)) }
+func SortInts64(a []int64) { sort.Slice(a, func(i, j int) bool { return a[i] < a[j] }) }