use crate::lint;
use rustc::ty::TyCtxt;
+use rustc_ast::ast;
use rustc_data_structures::fx::FxHashMap;
use rustc_errors::Applicability;
use rustc_hir as hir;
use rustc_hir::itemlikevisit::ItemLikeVisitor;
use rustc_hir::print::visibility_qualified;
use rustc_span::Span;
-use syntax::ast;
pub fn check_crate(tcx: TyCtxt<'_>) {
let mut used_trait_imports = DefIdSet::default();