Rollup merge of #136847 - nnethercote:simplify-intra-crate-quals, r=oli-obk

Simplify intra-crate qualifiers.

The following is a weird pattern for a file within `rustc_middle`:
```
use rustc_middle::aaa;
use crate::bbb;
```
More sensible and standard would be this:
```
use crate::{aaa, bbb};
```
I.e. we generally prefer using `crate::` to using a crate's own name. (Exceptions are things like in macros where `crate::` doesn't work because the macro is used in multiple crates.)

This commit fixes a bunch of these weird qualifiers.

r? `@jieyouxu`

0 files changed, 0 insertions, 0 deletions