clean up the previous implementation

Author: dingxiangfei2009

compiler/rustc_hir_typeck/src/expr_use_visitor.rs

@@ -150,51 +150,6 @@ pub trait TypeInformationCtxt<'tcx> {
     fn tcx(&self) -> TyCtxt<'tcx>;
 }
 
-impl<'tcx> TypeInformationCtxt<'tcx> for (TyCtxt<'tcx>, LocalDefId) {
-    type TypeckResults<'a>
-        = &'tcx ty::TypeckResults<'tcx>
-    where
-        Self: 'a;
-
-    type Error = !;
-
-    fn typeck_results(&self) -> Self::TypeckResults<'_> {
-        self.0.typeck(self.1)
-    }
-
-    fn resolve_vars_if_possible<T: TypeFoldable<TyCtxt<'tcx>>>(&self, t: T) -> T {
-        t
-    }
-
-    fn try_structurally_resolve_type(&self, _span: Span, ty: Ty<'tcx>) -> Ty<'tcx> {
-        ty
-    }
-
-    fn report_error(&self, span: Span, msg: impl ToString) -> Self::Error {
-        span_bug!(span, "{}", msg.to_string())
-    }
-
-    fn error_reported_in_ty(&self, _ty: Ty<'tcx>) -> Result<(), Self::Error> {
-        Ok(())
-    }
-
-    fn tainted_by_errors(&self) -> Result<(), Self::Error> {
-        Ok(())
-    }
-
-    fn type_is_copy_modulo_regions(&self, ty: Ty<'tcx>) -> bool {
-        ty.is_copy_modulo_regions(self.0, self.0.param_env(self.1))
-    }
-
-    fn body_owner_def_id(&self) -> LocalDefId {
-        self.1
-    }
-
-    fn tcx(&self) -> TyCtxt<'tcx> {
-        self.0
-    }
-}
-
 impl<'tcx> TypeInformationCtxt<'tcx> for &FnCtxt<'_, 'tcx> {
     type TypeckResults<'a>
         = Ref<'a, ty::TypeckResults<'tcx>>