Make sure we keep emitting a hard error

src/test/ui/consts/match_ice.rs

@@ -10,8 +10,6 @@ fn main() {
     match C {
         C => {}
         //~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]`
-        //~| WARN must be annotated
-        //~| WARN previously accepted
     }
     const K: &T = &T;
     match K {

src/test/ui/consts/match_ice.stderr

@@ -1,18 +1,8 @@
-warning: to use a constant of type `S` in a pattern, `S` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/match_ice.rs:11:9
-   |
-LL |         C => {}
-   |         ^
-   |
-   = note: `#[warn(indirect_structural_match)]` on by default
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #62411 <https://github.com/rust-lang/rust/issues/62411>
-
 error: to use a constant of type `S` in a pattern, `S` must be annotated with `#[derive(PartialEq, Eq)]`
   --> $DIR/match_ice.rs:11:9
    |
 LL |         C => {}
    |         ^
 
-error: aborting due to previous error; 1 warning emitted
+error: aborting due to previous error