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, 55 deletions

diff --git a/third_party/immer/immer/heap/thread_local_free_list_heap.hpp b/third_party/immer/immer/heap/thread_local_free_list_heap.hpp
deleted file mode 100644
index 9f7f48f43f6c..000000000000
--- a/third_party/immer/immer/heap/thread_local_free_list_heap.hpp
+++ /dev/null
@@ -1,55 +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 <immer/heap/unsafe_free_list_heap.hpp>
-
-namespace immer {
-namespace detail {
-
-template <typename Heap>
-struct thread_local_free_list_storage
-{
-    struct head_t
-    {
-        free_list_node* data;
-        std::size_t count;
-
-        ~head_t() { Heap::clear(); }
-    };
-
-    static head_t& head()
-    {
-        thread_local static head_t head_{nullptr, 0};
-        return head_;
-    }
-};
-
-} // namespace detail
-
-/*!
- * Adaptor that does not release the memory to the parent heap but
- * instead it keeps the memory in a `thread_local` global free
- * list. Must be preceded by a `with_data<free_list_node, ...>` heap
- * adaptor.  When the current thread finishes, the memory is returned
- * to the parent heap.
- *
- * @tparam Size  Maximum size of the objects to be allocated.
- * @tparam Limit Maximum number of elements to keep in the free list.
- * @tparam Base  Type of the parent heap.
- */
-template <std::size_t Size, std::size_t Limit, typename Base>
-struct thread_local_free_list_heap
-    : detail::unsafe_free_list_heap_impl<detail::thread_local_free_list_storage,
-                                         Size,
-                                         Limit,
-                                         Base>
-{};
-
-} // namespace immer