avoid kubernetes import for slice contains logic

Signed-off-by: tariqibrahim <tariq.ibrahim@microsoft.com>

cmd/helm/inspect.go

@@ -26,7 +26,6 @@ import (
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/chartutil"
-	"k8s.io/kubernetes/pkg/util/slice"
 )
 
 const inspectDesc = `
@@ -256,9 +255,18 @@ func (i *inspectCmd) run() error {
 
 func findReadme(files []*any.Any) (file *any.Any) {
 	for _, file := range files {
-		if slice.ContainsString(readmeFileNames, strings.ToLower(file.TypeUrl), nil) {
+		if contains(readmeFileNames, strings.ToLower(file.TypeUrl)) {
 			return file
 		}
 	}
 	return nil
 }
+
+func contains(slice []string, s string) bool {
+	for _, item := range slice {
+		if item == s {
+			return true
+		}
+	}
+	return false
+}