openmpi: reenable stackprotector on aarch64-darwin

The original error that required disabling the stack protector on
aarch64-darwin has been fixed in GCC.

pkgs/development/libraries/openmpi/default.nix

@@ -73,16 +73,6 @@ in stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  # disable stackprotector on aarch64-darwin for now
-  # https://github.com/NixOS/nixpkgs/issues/127608
-  #
-  # build error:
-  #
-  # /private/tmp/nix-build-openmpi-4.1.1.drv-0/ccg7QqR8.s:13:15: error: index must be an integer in range [-256, 255].
-  #         ldr     x2, [x2, ___stack_chk_guard];momd
-  #
-  hardeningDisable = lib.optionals (stdenv.isAarch64 && stdenv.isDarwin) [ "stackprotector" ];
-
   postInstall = ''
     rm -f $out/lib/*.la
    '';