build: Remove unnecessary std::ref, causing compilation issues with Boost 1.70.0

Refs: #4923
Change-Id: Idba1abe89161b11b1ec80fdceac51e2b00ed507b
diff --git a/tests/daemon/face/tcp-transport.t.cpp b/tests/daemon/face/tcp-transport.t.cpp
index 0b573f3..81da009 100644
--- a/tests/daemon/face/tcp-transport.t.cpp
+++ b/tests/daemon/face/tcp-transport.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2018,  Regents of the University of California,
+ * Copyright (c) 2014-2019,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -177,7 +177,7 @@
   BOOST_REQUIRE_EQUAL(this->limitedIo.run(2, 1_s), LimitedIo::EXCEED_OPS);
 
   auto transportObserver =
-    make_unique<PermanentTcpTransportReconnectObserver>(std::move(sock), std::ref(this->limitedIo));
+    make_unique<PermanentTcpTransportReconnectObserver>(std::move(sock), this->limitedIo);
   BOOST_REQUIRE_EQUAL(transportObserver->getState(), TransportState::UP);
 
   // break the TCP connection
diff --git a/tests/daemon/face/websocket-transport-fixture.hpp b/tests/daemon/face/websocket-transport-fixture.hpp
index bcf9cf9..e49d421 100644
--- a/tests/daemon/face/websocket-transport-fixture.hpp
+++ b/tests/daemon/face/websocket-transport-fixture.hpp
@@ -110,7 +110,7 @@
                                       1_s), LimitedIo::EXCEED_OPS);
 
     face = make_unique<Face>(make_unique<DummyLinkService>(),
-                             make_unique<WebSocketTransport>(serverHdl, std::ref(server), pingInterval));
+                             make_unique<WebSocketTransport>(serverHdl, server, pingInterval));
     transport = static_cast<WebSocketTransport*>(face->getTransport());
     serverReceivedPackets = &static_cast<DummyLinkService*>(face->getLinkService())->receivedPackets;