Rollup merge of #124511 - nnethercote:rm-extern-crates, r=fee1-dead

Remove many `#[macro_use] extern crate foo` items

This requires the addition of more `use` items, which often make the code more verbose. But they also make the code easier to read, because `#[macro_use]` obscures where macros are defined.

r? `@fee1-dead`

1 files changed, 2 insertions, 6 deletions

diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index adbac80d7cc..3b884ff864a 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -25,12 +25,6 @@
 #![feature(yeet_expr)]
 // tidy-alphabetical-end
 
-#[macro_use]
-extern crate rustc_macros;
-
-#[macro_use]
-extern crate tracing;
-
 extern crate self as rustc_errors;
 
 pub use codes::*;
@@ -64,6 +58,7 @@ use rustc_data_structures::stable_hasher::{Hash128, StableHasher};
 use rustc_data_structures::sync::{Lock, Lrc};
 use rustc_data_structures::AtomicRef;
 use rustc_lint_defs::LintExpectationId;
+use rustc_macros::{Decodable, Encodable};
 use rustc_span::source_map::SourceMap;
 use rustc_span::{Loc, Span, DUMMY_SP};
 use std::backtrace::{Backtrace, BacktraceStatus};
@@ -76,6 +71,7 @@ use std::num::NonZero;
 use std::ops::DerefMut;
 use std::panic;
 use std::path::{Path, PathBuf};
+use tracing::debug;
 
 use Level::*;