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, 69 deletions

diff --git a/third_party/nix/src/libexpr/attr-set.hh b/third_party/nix/src/libexpr/attr-set.hh
deleted file mode 100644
index 5d77e0907c..0000000000
--- a/third_party/nix/src/libexpr/attr-set.hh
+++ /dev/null
@@ -1,69 +0,0 @@
-// This file implements the underlying structure of Nix attribute sets.
-#pragma once
-
-#include <absl/container/btree_map.h>
-
-#include "libexpr/nixexpr.hh"
-#include "libexpr/symbol-table.hh"
-#include "libutil/types.hh"
-
-namespace nix {  // TODO(tazjin): ::expr
-
-class EvalState;
-struct Value;
-
-/* Map one attribute name to its value. */
-struct Attr {
-  Symbol name;
-  Value* value;  // TODO(tazjin): Who owns this?
-  Pos* pos;      // TODO(tazjin): Who owns this?
-  Attr(Symbol name, Value* value, Pos* pos = &noPos)
-      : name(name), value(value), pos(pos){};
-};
-
-using AttributeMap = absl::btree_map<Symbol, Attr>;
-
-class Bindings {
- public:
-  using iterator = AttributeMap::iterator;
-  using const_iterator = AttributeMap::const_iterator;
-
-  // Allocate a new attribute set that is visible to the garbage
-  // collector.
-  static std::unique_ptr<Bindings> New(size_t capacity = 0);
-
-  // Create a new attribute set by merging two others. This is used to
-  // implement the `//` operator in Nix.
-  static std::unique_ptr<Bindings> Merge(const Bindings& lhs,
-                                         const Bindings& rhs);
-
-  // Return the number of contained elements.
-  size_t size() const;
-
-  // Is this attribute set empty?
-  bool empty();
-
-  // Insert, but do not replace, values in the attribute set.
-  void push_back(const Attr& attr);
-
-  // Are these two attribute sets deeply equal?
-  // Note: Does not special-case derivations. Use state.eqValues() to check
-  // attrsets that may be derivations.
-  bool Equal(const Bindings* other, EvalState& state) const;
-
-  // Look up a specific element of the attribute set.
-  iterator find(const Symbol& name);
-
-  iterator begin();
-  const_iterator cbegin() const;
-  iterator end();
-  const_iterator cend() const;
-
-  // oh no
-  friend class EvalState;
-
- private:
-  AttributeMap attributes_;
-};
-
-}  // namespace nix