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, 54 deletions

diff --git a/third_party/immer/test/transient_tester.hpp b/third_party/immer/test/transient_tester.hpp
deleted file mode 100644
index 3cf891bef957..000000000000
--- a/third_party/immer/test/transient_tester.hpp
+++ /dev/null
@@ -1,54 +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 "dada.hpp"
-
-namespace {
-
-template <typename VP, typename VT>
-struct transient_tester
-{
-    VP vp;
-    VT vt;
-    dadaism d      = {};
-    bool transient = false;
-
-    transient_tester(VP vp)
-        : vp{vp}
-        , vt{vp.transient()}
-    {}
-
-    bool step()
-    {
-        auto s = d.next();
-        if (soft_dada()) {
-            auto new_transient = !transient;
-            try {
-                if (new_transient)
-                    vt = vp.transient();
-                else
-                    vp = vt.persistent();
-            } catch (const dada_error&) {
-                return false;
-            }
-            transient = new_transient;
-            return true;
-        } else
-            return false;
-    }
-};
-
-template <typename VP>
-transient_tester<VP, typename VP::transient_type> as_transient_tester(VP p)
-{
-    return {std::move(p)};
-}
-
-} // anonymous namespace