Bugfixed: NO_PURGE now works on all diff2 providers (#2084)

pkg/diff2/compareconfig_test.go

@@ -1,7 +1,6 @@
 package diff2
 
 import (
-	"encoding/json"
 	"strings"
 	"testing"
 
@@ -9,11 +8,6 @@ import (
 	"github.com/kylelemons/godebug/diff"
 )
 
-func prettyPrint(i interface{}) string {
-	s, _ := json.MarshalIndent(i, "", "\t")
-	return string(s)
-}
-
 func TestNewCompareConfig(t *testing.T) {
 	type args struct {
 		origin   string