go: Replace Logrus with go-logging.

go/src/infra/libs/logging/logrus_test.go

Index: go/src/infra/libs/logging/logrus_test.go
diff --git a/go/src/infra/libs/logging/logrus_test.go b/go/src/infra/libs/logging/logrus_test.go
deleted file mode 100644
index 14e4dd3732f0f0036d532fdbbcc333142ac6028e..0000000000000000000000000000000000000000
--- a/go/src/infra/libs/logging/logrus_test.go
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// +build !appengine
-
-package logging
-
-import "github.com/Sirupsen/logrus"
-
-func ExampleLogrusLogger() {
-	// If it compiles, then logrus.Logger interface matches Logger interface.
-	var _ Logger = logrus.New()
-}