Remove unused Condition class.

GitOrigin-RevId: d82bd14425f46cd8b3ddde8ca50db15ed07ff9c9

tdactor/CMakeLists.txt

@@ -19,7 +19,6 @@ set(TDACTOR_SOURCE
   td/actor/impl/Event.h
   td/actor/impl/Scheduler-decl.h
   td/actor/impl/Scheduler.h
-  td/actor/Condition.h
   td/actor/MultiPromise.h
   td/actor/PromiseFuture.h
   td/actor/SchedulerLocalStorage.h

tdactor/td/actor/Condition.h

@@ -1,50 +0,0 @@
-//
-// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-#pragma once
-
-#include "td/actor/actor.h"
-#include "td/actor/PromiseFuture.h"
-
-#include "td/utils/common.h"
-
-namespace td {
-
-class Condition {
-  class Helper : public Actor {
-   public:
-    void wait(Promise<> promise) {
-      pending_promises_.push_back(std::move(promise));
-    }
-
-   private:
-    std::vector<Promise<>> pending_promises_;
-    void tear_down() override {
-      for (auto &promise : pending_promises_) {
-        promise.set_value(Unit());
-      }
-    }
-  };
-
- public:
-  Condition() {
-    own_actor_ = create_actor<Helper>("helper");
-    actor_ = own_actor_.get();
-  }
-  void wait(Promise<> promise) {
-    send_closure(actor_, &Helper::wait, std::move(promise));
-  }
-  void set_true() {
-    CHECK(!own_actor_.empty());
-    own_actor_.reset();
-  }
-
- private:
-  ActorId<Helper> actor_;
-  ActorOwn<Helper> own_actor_;
-};
-
-}  // namespace td