+use rustc_ast::tokenstream::{TokenStream, TokenTree};
use rustc_expand::base::{self, ExtCtxt};
+use rustc_span::symbol::kw;
use rustc_span::Span;
-use syntax::symbol::kw;
-use syntax::tokenstream::{TokenStream, TokenTree};
pub fn expand_trace_macros(
cx: &mut ExtCtxt<'_>,