Adjust test expectations for latest nightly version of rustc.

Author: anforowicz

tests/ui/opaque_autotraits.stderr

@@ -57,7 +57,7 @@ error[E0277]: `PhantomPinned` cannot be unpinned
 note: required because it appears within the type `PhantomData<PhantomPinned>`
   --> $RUST/core/src/marker.rs
    |
-   | pub struct PhantomData<T: ?Sized>;
+   | pub struct PhantomData<T: PointeeSized>;
    |            ^^^^^^^^^^^
 note: required because it appears within the type `cxx::private::Opaque`
   --> src/opaque.rs

tests/ui/result_no_display.stderr

@@ -2,7 +2,4 @@ error[E0277]: `NonError` doesn't implement `std::fmt::Display`
  --> tests/ui/result_no_display.rs:4:19
   |
 4 |         fn f() -> Result<()>;
-  |                   ^^^^^^^^^^ `NonError` cannot be formatted with the default formatter
-  |
-  = help: the trait `std::fmt::Display` is not implemented for `NonError`
-  = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
+  |                   ^^^^^^^^^^ the trait `std::fmt::Display` is not implemented for `NonError`

tests/ui/vector_autotraits.stderr

@@ -20,7 +20,7 @@ note: required because it appears within the type `NotThreadSafe`
 note: required because it appears within the type `PhantomData<[NotThreadSafe]>`
   --> $RUST/core/src/marker.rs
    |
-   | pub struct PhantomData<T: ?Sized>;
+   | pub struct PhantomData<T: PointeeSized>;
    |            ^^^^^^^^^^^
 note: required because it appears within the type `CxxVector<NotThreadSafe>`
   --> src/cxx_vector.rs