Remove libs/clock in favor of luci-go/common/clock.

go/src/infra/libs/clock/testclock/testclock_test.go

Index: go/src/infra/libs/clock/testclock/testclock_test.go
diff --git a/go/src/infra/libs/clock/testclock/testclock_test.go b/go/src/infra/libs/clock/testclock/testclock_test.go
deleted file mode 100644
index 5fae355ada75b62c39d68a25f20e7eae54800470..0000000000000000000000000000000000000000
--- a/go/src/infra/libs/clock/testclock/testclock_test.go
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2015 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.
-
-package testclock
-
-import (
-	"testing"
-	"time"
-
-	. "github.com/smartystreets/goconvey/convey"
-	"infra/libs/clock"
-)
-
-func TestTestClock(t *testing.T) {
-	t.Parallel()
-
-	Convey(`A testing clock instance`, t, func() {
-		now := time.Date(2015, 01, 01, 00, 00, 00, 00, time.UTC)
-		c := New(now)
-
-		Convey(`Returns the current time.`, func() {
-			So(c.Now(), ShouldResemble, now)
-		})
-
-		Convey(`When sleeping with a time of zero, immediately awakens.`, func() {
-			c.Sleep(0)
-			So(c.Now(), ShouldResemble, now)
-		})
-
-		Convey(`When sleeping for a period of time, awakens when signalled.`, func() {
-			sleepingC := make(chan struct{})
-			c.SetTimerCallback(func(_ clock.Timer) {
-				close(sleepingC)
-			})
-
-			awakeC := make(chan time.Time)
-			go func() {
-				c.Sleep(2 * time.Second)
-				awakeC <- c.Now()
-			}()
-
-			<-sleepingC
-			c.Set(now.Add(1 * time.Second))
-			c.Set(now.Add(2 * time.Second))
-			So(<-awakeC, ShouldResemble, now.Add(2*time.Second))
-		})
-
-		Convey(`Awakens after a period of time.`, func() {
-			afterC := c.After(2 * time.Second)
-
-			c.Set(now.Add(1 * time.Second))
-			c.Set(now.Add(2 * time.Second))
-			So(<-afterC, ShouldResemble, now.Add(2*time.Second))
-		})
-	})
-}