chore(3p/nix): unvendor tvix 0.1 r/4098

Nothing is using this now, and we'll likely never pick this up again,
but we learned a lot in the process.

Every now and then this breaks in some bizarre way on channel bumps
and it's just a waste of time to maintain that.

Change-Id: Idcf2f5acd4ca7070ce18d7149cbfc0d967dc0a44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5632
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 19 deletions

diff --git a/third_party/nix/src/libutil/visitor.hh b/third_party/nix/src/libutil/visitor.hh
deleted file mode 100644
index bf1d665af7..0000000000
--- a/third_party/nix/src/libutil/visitor.hh
+++ /dev/null
@@ -1,19 +0,0 @@
-#pragma once
-
-namespace nix::util {
-
-// Helper class used for visiting std::variants by creating a variadic
-// list of lambda expressions that delegates calls to each of the
-// callables.
-//
-// See e.g.
-// https://dev.to/tmr232/that-overloaded-trick-overloading-lambdas-in-c17
-template <class... Ts>
-struct overloaded : Ts... {
-  using Ts::operator()...;
-};
-
-template <class... Ts>
-overloaded(Ts...) -> overloaded<Ts...>;
-
-}  // namespace nix::util