Method remove

cachelib/interface/tests/InterfaceTest.cpp:154–165

  folly::coro::AsyncGenerator<ReadHandle> iterator() override { co_return; }

  folly::coro::Task<Result<bool>> remove(Key key) override {
    auto itemIt = cachedItems_.find(key);
    if (itemIt == cachedItems_.end()) {
      co_return false;
    }
    if (itemIt->second->decrementRefCount(*this)) {
      delete itemIt->second;
    }
    removedItems_.emplace(itemIt->first);
    cachedItems_.erase(itemIt);
    co_return true;
  }

  folly::coro::Task<UnitResult> remove(ReadHandle&& handle) override {
    auto itemIt = cachedItems_.find(handle->getKey());