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

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -39,7 +39,6 @@ use smallvec::SmallVec;
 use std::cell::OnceCell;
 use std::cell::RefCell;
 use std::iter;
-use tracing::debug;
 
 mod create_scope_map;
 pub mod gdb;

compiler/rustc_codegen_llvm/src/debuginfo/utils.rs

@@ -6,7 +6,7 @@ use super::CodegenUnitDebugContext;
 use rustc_hir::def_id::DefId;
 use rustc_middle::ty::layout::{HasParamEnv, LayoutOf};
 use rustc_middle::ty::{self, DefIdTree, Ty};
-use tracing::trace;
+use trace;
 
 use crate::common::CodegenCx;
 use crate::llvm;