Rollup merge of #39443 - phungleson:remove-unresolved-things, r=nikomatsakis

Don't suggest to use things which weren't found either

Fixes #38054

The best code I can come up with, suggestions are welcome.

Basically, removing ```. Did you mean to use `DoesntExist1`?``` in the code below, because it is useless.

```rust
error[E0432]: unresolved import `DoesntExist1`
 --> src/lib.rs:1:5
  |
1 | use DoesntExist1;
  |     ^^^^^^^^^^^^ no `DoesntExist1` in the root

error[E0432]: unresolved import `DoesntExist2`
 --> src/lib.rs:2:5
  |
2 | use DoesntExist2;
  |     ^^^^^^^^^^^^ no `DoesntExist2` in the root. Did you mean to use `DoesntExist1`?
```

0 files changed, 0 insertions, 0 deletions