de-stabilize bench attribute

RalfJung · RalfJung · commit a35de3865044 · 2024-12-13T18:29:41.000+01:00
diff --git a/library/core/src/macros/mod.rs b/library/core/src/macros/mod.rs
@@ -1683,7 +1683,6 @@ pub(crate) mod builtin {
     #[unstable(
         feature = "test",
         issue = "50297",
-        soft,
         reason = "`bench` is a part of custom test frameworks which are unstable"
     )]
     #[allow_internal_unstable(test, rustc_attrs, coverage_attribute)]
