Revert "vfkit: use lld to avoid trap during linking"

This reverts commit 559ebc0633.

pkgs/by-name/vf/vfkit/package.nix

@@ -5,7 +5,6 @@
   darwin,
   fetchFromGitHub,
   fetchpatch2,
-  llvmPackages,
   nix-update-script,
   testers,
   vfkit,
@@ -34,17 +33,12 @@ buildGoModule rec {
 
   nativeBuildInputs = [
     darwin.sigtool
-    # TODO: Remove this when NixOS/nixpkgs#536365 reaches master.
-    llvmPackages.lld
   ];
 
   buildInputs = [
     apple-sdk_15
   ];
 
-  # TODO: Remove this when NixOS/nixpkgs#536365 reaches master.
-  env.NIX_CFLAGS_LINK = "-fuse-ld=${lib.getExe' llvmPackages.lld "ld64.lld"}";
-
   postFixup = ''
     codesign --entitlements vf.entitlements -f -s - $out/bin/vfkit
   '';