execution/split: P3682R0 remove split algorithm

revert ae2af90 (ﾉД`)

Author: yohhoy

reference/execution/execution.md

@@ -122,7 +122,6 @@ namespace std::execution {
 | [`execution::let_error`](execution/let_error.md) | エラー完了結果から入れ子の非同期操作へ変換 (customization point object) | C++26 |
 | [`execution::let_stopped`](execution/let_stopped.md) | 停止完了を入れ子の非同期操作へ変換 (customization point object) | C++26 |
 | [`execution::bulk`](execution/bulk.md) | インデクス空間上で指定関数を反復実行 (customization point object) | C++26 |
-| [`execution::split`](execution/split.md) | 入力Senderの値を複製回送信可能とする (customization point object) | C++26 |
 | [`execution::when_all`](execution/when_all.md) | 全ての入力Sender完了を待機 (customization point object) | C++26 |
 | [`execution::when_all_with_variant`](execution/when_all_with_variant.md) | 複数の値完了シグネチャをもつ全ての入力Sender完了を待機 (customization point object) | C++26 |
 | [`execution::into_variant`](execution/into_variant.md) | 複数の値完了シグネチャを単一[`variant`](/reference/variant/variant.md)型の値完了シグネチャに変換 (customization point object) | C++26 |
@@ -163,3 +162,4 @@ Senderコンシューマは名前空間 `std::this_thread` で定義される。
 ## 参照
 - [P0024R2 The Parallelism TS Should be Standardized](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0024r2.html)
 - [P2300R10 `std::execution`](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2300r10.html)
+- [P3682R0 Remove `std::execution::split`](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2025/p3682r0.pdf)

reference/execution/execution/on-stop-request.md

@@ -24,7 +24,6 @@ struct on-stop-request {
 
 ## 関連項目
 - [`execution::when_all`](when_all.md)
-- [`execution::split`](split.md)
 
 
 ## 参照