It's just no use. No use at all.
9 seconds sound clip from the Cinderella (1950) movie soundboard.
You can hear this line at 00:42:35 in the Blu-ray version of the movie.
Quote context
[...]
- Thief!
- Girls, girls. That's quite enough.
- Hurry along now, both of you. I won't have you upsetting yourselves.
- It's just no use. No use at all.
- I can't believe. Not any more.
- There's nothing left to believe in. Nothing.
- Nothing, my dear? Oh, now you don't really mean that.
[...]