Revert "yabai: work around ld64 hardening issue"

The ld64 issue has been fixed.

This reverts commit 0125c384a5.

pkgs/by-name/ya/yabai/package.nix

@@ -28,17 +28,12 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     installShellFiles
     xxd
-    # TODO: Clean up on `staging`.
-    llvmPackages.lld
   ];
 
   buildInputs = [
     apple-sdk_15
   ];
 
-  # TODO: Clean up on `staging`.
-  env.NIX_CFLAGS_LINK = "-fuse-ld=lld";
-
   # Upstream Makefile races clean-build against linking under parallel make.
   enableParallelBuilding = false;