update let-else-deref-coercion for latest nightly error messages

Author: cormacrelf

src/test/ui/let-else/let-else-deref-coercion.stderr

@@ -5,11 +5,6 @@ LL |         let Bar::Present(z) = self else {
    |             ^^^^^^^^^^^^^^^   ---- this expression has type `&mut Foo`
    |             |
    |             expected struct `Foo`, found enum `Bar`
-   |
-help: you might have meant to use field `0` whose type is `Bar`
-   |
-LL |         let Bar::Present(z) = self.0 else {
-   |                               ~~~~~~
 
 error[E0308]: mismatched types
   --> $DIR/let-else-deref-coercion.rs:68:13
@@ -18,11 +13,6 @@ LL |         let Bar(z) = x;
    |             ^^^^^^   - this expression has type `&mut irrefutable::Foo`
    |             |
    |             expected struct `irrefutable::Foo`, found struct `irrefutable::Bar`
-   |
-help: you might have meant to use field `0` whose type is `irrefutable::Bar`
-   |
-LL |         let Bar(z) = x.0;
-   |                      ~~~
 
 error: aborting due to 2 previous errors