Fix rustc_passes build import error

Author: Urgau

compiler/rustc_passes/src/entry.rs

@@ -7,7 +7,6 @@ use rustc_hir::{ItemId, Node, CRATE_HIR_ID};
 use rustc_middle::query::Providers;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::config::{sigpipe, CrateType, EntryFnType, RemapPathScopeComponents};
-use rustc_session::parse::feature_err;
 use rustc_span::symbol::sym;
 use rustc_span::{Span, Symbol};