Remove integer_atomics feature gate due to stabilization
diff --git a/crates/core_arch/src/lib.rs b/crates/core_arch/src/lib.rs
index f179dbd..9b346fe 100644
--- a/crates/core_arch/src/lib.rs
+++ b/crates/core_arch/src/lib.rs
@@ -34,14 +34,6 @@
abi_unadjusted,
adx_target_feature
)]
-// NB: When running nvptx/nvptx64 cross tests, enabling "integer_atomics" yields
-// a compile-time error: 'unknown feature `integer_atomics`'. This ought to be
-// investigated further, but for now just disable "integer_atomics" so we can
-// run _some_ test for the nvptx/nvptx64 targets.
-#![cfg_attr(
- not(any(target_arch = "nvptx", target_arch = "nvptx64")),
- feature(integer_atomics)
-)]
#![cfg_attr(test, feature(test, abi_vectorcall, untagged_unions))]
#