Remove #[macro_use] extern crate tracing from rustc_hir_analysis.

compiler/rustc_hir_analysis/src/collect/generics_of.rs

@@ -10,6 +10,7 @@ use rustc_middle::ty::{self, TyCtxt};
 use rustc_session::lint;
 use rustc_span::symbol::{kw, Symbol};
 use rustc_span::Span;
+use tracing::{debug, instrument};
 
 use crate::delegation::inherit_generics_for_delegation_item;
 use crate::middle::resolve_bound_vars as rbv;