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`

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler/rustc_middle/src/ty/instance.rs b/compiler/rustc_middle/src/ty/instance.rs
index b7a648aae3f..e9c19331e4a 100644
--- a/compiler/rustc_middle/src/ty/instance.rs
+++ b/compiler/rustc_middle/src/ty/instance.rs
@@ -10,13 +10,13 @@ use rustc_hir::def_id::{CrateNum, DefId};
 use rustc_hir::lang_items::LangItem;
 use rustc_index::bit_set::FiniteBitSet;
 use rustc_macros::{Decodable, Encodable, HashStable, Lift, TyDecodable, TyEncodable};
-use rustc_middle::ty::normalize_erasing_regions::NormalizationError;
 use rustc_span::def_id::LOCAL_CRATE;
 use rustc_span::{DUMMY_SP, Span, Symbol};
 use tracing::{debug, instrument};
 
 use crate::error;
 use crate::middle::codegen_fn_attrs::CodegenFnAttrFlags;
+use crate::ty::normalize_erasing_regions::NormalizationError;
 use crate::ty::print::{FmtPrinter, Printer, shrunk_instance_name};
 use crate::ty::{
     self, EarlyBinder, GenericArgs, GenericArgsRef, Ty, TyCtxt, TypeFoldable, TypeSuperVisitable,