cargo: Remove unused -fuse-ld=lld flag from Win config (#37769)

It is unused and generates a warning

```
 LINK : warning LNK4044: unrecognized option '/fuse-ld=lld'; ignored
```

If in the future we want to give `lld-link.exe` a try, we can set

```toml
linker = "lld-link.exe"
```

instead. At the time of writing, my tests have shown that there is no
real difference between `lld-link` and `link` in terms of linking speed.

Release Notes:

- N/A
01f5b73e3bJakub Konka committed on 9/8/2025, 10:43:56 AM· committed by GitHubparenta0081dd
1 file changedLine totals unavailable