Accept TyCtxt instead of TyCtxtAt in Ty::is_* functions

Functions in answer:

- `Ty::is_freeze`
- `Ty::is_sized`
- `Ty::is_unpin`
- `Ty::is_copy_modulo_regions`

compiler/rustc_ty_utils/src/instance.rs

@@ -4,7 +4,7 @@ use rustc_infer::infer::TyCtxtInferExt;
 use rustc_middle::traits::CodegenObligationError;
 use rustc_middle::ty::subst::SubstsRef;
 use rustc_middle::ty::{self, Instance, TyCtxt, TypeVisitable};
-use rustc_span::{sym, DUMMY_SP};
+use rustc_span::sym;
 use rustc_trait_selection::traits;
 use traits::{translate_substs, Reveal};
 
@@ -236,7 +236,7 @@ fn resolve_associated_item<'tcx>(
                 if name == sym::clone {
                     let self_ty = trait_ref.self_ty();
 
-                    let is_copy = self_ty.is_copy_modulo_regions(tcx.at(DUMMY_SP), param_env);
+                    let is_copy = self_ty.is_copy_modulo_regions(tcx, param_env);
                     match self_ty.kind() {
                         _ if is_copy => (),
                         ty::Generator(..)