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`

2 files changed, 2 insertions, 5 deletions

diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs
index c1007ccd8e9..b2d38a00f0b 100644
--- a/compiler/rustc_driver_impl/src/lib.rs
+++ b/compiler/rustc_driver_impl/src/lib.rs
@@ -14,9 +14,6 @@
 #![feature(panic_update_hook)]
 #![feature(result_flattening)]
 
-#[macro_use]
-extern crate tracing;
-
 use rustc_ast as ast;
 use rustc_codegen_ssa::{traits::CodegenBackend, CodegenErrors, CodegenResults};
 use rustc_const_eval::CTRL_C_RECEIVED;
@@ -46,7 +43,6 @@ use rustc_span::symbol::sym;
 use rustc_span::FileName;
 use rustc_target::json::ToJson;
 use rustc_target::spec::{Target, TargetTriple};
-
 use std::cmp::max;
 use std::collections::BTreeMap;
 use std::env;
@@ -62,6 +58,7 @@ use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, OnceLock};
 use std::time::{Instant, SystemTime};
 use time::OffsetDateTime;
+use tracing::trace;
 
 #[allow(unused_macros)]
 macro do_not_use_print($($t:tt)*) {
diff --git a/compiler/rustc_driver_impl/src/pretty.rs b/compiler/rustc_driver_impl/src/pretty.rs
index 40f6f764993..fe426b8111c 100644
--- a/compiler/rustc_driver_impl/src/pretty.rs
+++ b/compiler/rustc_driver_impl/src/pretty.rs
@@ -13,9 +13,9 @@ use rustc_session::Session;
 use rustc_smir::rustc_internal::pretty::write_smir_pretty;
 use rustc_span::symbol::Ident;
 use rustc_span::FileName;
-
 use std::cell::Cell;
 use std::fmt::Write;
+use tracing::debug;
 
 pub use self::PpMode::*;
 pub use self::PpSourceMode::*;