cleanup useless IntToInt32Array func

Signed-off-by: Kay Yan <kay.yan@daocloud.io>

cmd/ctr/commands/utils.go

@@ -1,27 +0,0 @@
-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
-package commands
-
-// IntToInt32Array converts an array of int's to int32's
-func IntToInt32Array(in []int) []int32 {
-	var ret []int32
-
-	for _, v := range in {
-		ret = append(ret, int32(v))
-	}
-	return ret
-}