Always import all tracing macros for the entire crate instead of piecemeal by module

compiler/rustc_parse/src/lexer/mod.rs

@@ -14,8 +14,6 @@ use rustc_session::parse::ParseSess;
 use rustc_span::symbol::{sym, Symbol};
 use rustc_span::{edition::Edition, BytePos, Pos, Span};
 
-use tracing::debug;
-
 mod tokentrees;
 mod unescape_error_reporting;
 mod unicode_chars;

compiler/rustc_parse/src/lexer/unescape_error_reporting.rs

@@ -20,13 +20,9 @@ pub(crate) fn emit_unescape_error(
     range: Range<usize>,
     error: EscapeError,
 ) {
-    tracing::debug!(
+    debug!(
         "emit_unescape_error: {:?}, {:?}, {:?}, {:?}, {:?}",
-        lit,
-        span_with_quotes,
-        mode,
-        range,
-        error
+        lit, span_with_quotes, mode, range, error
     );
     let last_char = || {
         let c = lit[range.clone()].chars().rev().next().unwrap();

compiler/rustc_parse/src/parser/attr.rs

@@ -7,8 +7,6 @@ use rustc_errors::{error_code, Diagnostic, PResult};
 use rustc_span::{sym, BytePos, Span};
 use std::convert::TryInto;
 
-use tracing::debug;
-
 // Public for rustfmt usage
 #[derive(Debug)]
 pub enum InnerAttrPolicy<'a> {

compiler/rustc_parse/src/parser/diagnostics.rs

@@ -29,7 +29,6 @@ use std::ops::{Deref, DerefMut};
 use std::mem::take;
 
 use crate::parser;
-use tracing::{debug, trace};
 
 const TURBOFISH_SUGGESTION_STR: &str =
     "use `::<...>` instead of `<...>` to specify lifetime, type, or const arguments";

compiler/rustc_parse/src/parser/item.rs

@@ -22,7 +22,6 @@ use rustc_span::DUMMY_SP;
 
 use std::convert::TryFrom;
 use std::mem;
-use tracing::debug;
 
 impl<'a> Parser<'a> {
     /// Parses a source module as a crate. This is the main entry point for the parser.

compiler/rustc_parse/src/parser/mod.rs

@@ -37,7 +37,6 @@ use rustc_errors::{
 use rustc_session::parse::ParseSess;
 use rustc_span::source_map::{Span, DUMMY_SP};
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
-use tracing::debug;
 
 use std::ops::Range;
 use std::{cmp, mem, slice};

compiler/rustc_parse/src/parser/path.rs

@@ -13,7 +13,6 @@ use rustc_span::source_map::{BytePos, Span};
 use rustc_span::symbol::{kw, sym, Ident};
 
 use std::mem;
-use tracing::debug;
 
 /// Specifies how to parse a path.
 #[derive(Copy, Clone, PartialEq)]