chore(3p/immer): Remove vendored copy of immer r/2029

We ended up dropping the use of this library again.

Change-Id: I2c44cd22a6128d23f87a582402bf5fb84991d608
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2292
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

1 files changed, 0 insertions, 49 deletions

diff --git a/third_party/immer/extra/guile/scm/detail/util.hpp b/third_party/immer/extra/guile/scm/detail/util.hpp
deleted file mode 100644
index fdc323722e99..000000000000
--- a/third_party/immer/extra/guile/scm/detail/util.hpp
+++ /dev/null
@@ -1,49 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#pragma once
-
-#include <libguile.h>
-
-namespace scm {
-namespace detail {
-
-#define SCM_DECLTYPE_RETURN(...)                \
-    decltype(__VA_ARGS__)                       \
-    { return __VA_ARGS__; }                     \
-    /**/
-
-template <typename... Ts>
-constexpr bool is_valid_v = true;
-
-template <typename... Ts>
-using is_valid_t = void;
-
-template <typename... Ts>
-void check_call_once()
-{
-    static bool called = false;
-    if (called) scm_misc_error (nullptr, "Double defined binding. \
-This may be caused because there are multiple C++ binding groups in the same \
-translation unit.  You may solve this by using different type tags for each \
-binding group.", SCM_EOL);
-    called = true;
-}
-
-struct move_sequence
-{
-    move_sequence() = default;
-    move_sequence(const move_sequence&) = delete;
-    move_sequence(move_sequence&& other)
-    { other.moved_from_ = true; };
-
-    bool moved_from_ = false;
-};
-
-} // namespace detail
-} // namespace scm