common: stop importing std::{bind,ref,cref} into namespace ndn

And reduce the usage of std::bind() throughout the codebase.
C++14 lambdas are easier to understand for humans and more
likely to be optimized by the compiler.

Change-Id: Ia59fad34539710f8801c52914896ce426fb7e538
diff --git a/tests/unit/net/face-uri.t.cpp b/tests/unit/net/face-uri.t.cpp
index c8f7d16..76af381 100644
--- a/tests/unit/net/face-uri.t.cpp
+++ b/tests/unit/net/face-uri.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2020 Regents of the University of California,
+ * Copyright (c) 2013-2021 Regents of the University of California,
  *                         Arizona Board of Regents,
  *                         Colorado State University,
  *                         University Pierre & Marie Curie, Sorbonne University,
@@ -69,8 +69,8 @@
     auto tc = make_shared<CanonizeTestCase>(request, shouldSucceed, expectedUri);
 
     FaceUri uri(request);
-    uri.canonize(bind(&CanonizeFixture::onCanonizeSuccess, this, tc, _1),
-                 bind(&CanonizeFixture::onCanonizeFailure, this, tc, _1),
+    uri.canonize(std::bind(&CanonizeFixture::onCanonizeSuccess, this, tc, _1),
+                 std::bind(&CanonizeFixture::onCanonizeFailure, this, tc, _1),
                  m_io, 10_s);
   }