Remove useless evb loop/terminate in HQClient

Summary: Remove useless evb loop/terminate in HQClient

Reviewed By: afrind

Differential Revision: D69151301

fbshipit-source-id: 9a6f8b46e33cbbf5c20050d380d2a25ead9cd71e

proxygen/httpserver/samples/hq/HQClient.cpp

@@ -50,9 +50,6 @@ int HQClient::start() {
   LOG(INFO) << "HQClient connecting to " << params_.remoteAddress->describe();
   quicClient_->start(this, nullptr);
 
-  // This is to flush the CFIN out so the server will see the handshake as
-  // complete.
-  evb_.loopForever();
   if (params_.migrateClient) {
     quicClient_->onNetworkSwitch(
         std::make_unique<FollyQuicAsyncUDPSocket>(qEvb_));
@@ -274,7 +271,6 @@ void HQClient::sendKnobFrame(const folly::StringPiece str) {
 void HQClient::onReplaySafe() noexcept {
   VLOG(4) << "Transport replay safe";
   replaySafe_ = true;
-  evb_.terminateLoopSoon();
 }
 
 void HQClient::connectError(const quic::QuicError& error) {