Revert "Add rdkafka client" (wrong branch)

This reverts commit e4f9d3e4.

receiver/src/request_handler/request_handler_kafka_notify.cpp

-#include "request_handler_kafka_notify.h"
-#include "../request.h"
-
-namespace asapo {
-
-Error RequestHandlerKafkaNotify::ProcessRequest(Request* request) const {
-    if (!kafka_client_) {
-        //client was not initialized, ignore
-        return nullptr;
-    }
-
-    std::string message = "{"
-            "\"event\":\"IN_CLOSE_WRITE\","
-            "\"path\":\"" + request->GetFileName() + "\""
-    "}";
-
-    return kafka_client_->Send(message, "asapo");
-}
-
-StatisticEntity RequestHandlerKafkaNotify::GetStatisticEntity() const {
-    return StatisticEntity::kNetwork;
-}
-
-RequestHandlerKafkaNotify::RequestHandlerKafkaNotify() : kafka_client_{GetKafkaClient()} {
-}
-}
\ No newline at end of file

receiver/src/request_handler/request_handler_kafka_notify.h

-#ifndef ASAPO_REQUEST_HANDLER_KAFKA_NOTIFY_H
-#define ASAPO_REQUEST_HANDLER_KAFKA_NOTIFY_H
-
-#include "request_handler.h"
-#include "asapo/kafka_client/kafka_client.h"
-
-namespace asapo {
-
-class RequestHandlerKafkaNotify final : public ReceiverRequestHandler {
-  public:
-    RequestHandlerKafkaNotify();
-    StatisticEntity GetStatisticEntity() const override;
-    Error ProcessRequest(Request* request) const override;
-  private:
-    std::unique_ptr<KafkaClient> kafka_client_;
-};
-
-}
-
-#endif //ASAPO_REQUEST_HANDLER_KAFKA_NOTIFY_H