[Bug]: unload SD from RAM

### Checklist

- [ ] The issue exists after disabling all extensions
- [X] The issue exists on a clean installation of webui
- [ ] The issue is caused by an extension, but I believe it is caused by a bug in the webui
- [ ] The issue exists in the current version of the webui
- [ ] The issue has not been reported before recently
- [ ] The issue has been reported before but has not been fixed yet

### What happened?

dont work
i use gpu-z to verify

if i want use extension "supermerger" i need all RAM
https://github.com/hako-mikan/sd-webui-supermerger.git

### Steps to reproduce the problem

press unload nutton

### What should have happened?

free ram

### What browsers do you use to access the UI ?

_No response_

### Sysinfo

win10
rtx4969

### Console logs

```Shell
no error
no log
```

### Additional information

_No response_

Start by reproducing the problem with the web UI's unload button while the supermerger extension is used, checking RAM behavior on the reported Windows setup. Done means unloading the model releases the expected RAM; the issue provides no file, test, entry point, or console log to narrow the investigation.

Written by the indexing model from the issue text.