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

go/src/infra/libs/clock/clockflag/time.go

Index: go/src/infra/libs/clock/clockflag/time.go
diff --git a/go/src/infra/libs/clock/clockflag/time.go b/go/src/infra/libs/clock/clockflag/time.go
deleted file mode 100644
index 3065183950ca4c550c54434a5d02bffb76175b74..0000000000000000000000000000000000000000
--- a/go/src/infra/libs/clock/clockflag/time.go
+++ /dev/null
@@ -1,59 +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.
-
-package clockflag
-
-import (
-	"encoding/json"
-	"flag"
-	"time"
-)
-
-// Time is a flag- and JSON-compatible Time which parses from RFC3339 strings.
-type Time time.Time
-
-var _ interface {
-	flag.Value
-	json.Unmarshaler
-	json.Marshaler
-} = (*Time)(nil)
-
-// Time returns the Time value associated with this Time.
-func (t Time) Time() time.Time {
-	return time.Time(t)
-}
-
-// Set implements flag.Value.
-func (t *Time) Set(value string) error {
-	timeValue, err := time.Parse(time.RFC3339Nano, value)
-	if err != nil {
-		return err
-	}
-	*t = Time(timeValue.UTC())
-	return nil
-}
-
-func (t *Time) String() string {
-	return time.Time(*t).String()
-}
-
-// UnmarshalJSON implements json.Unmarshaler.
-//
-// Unmarshals a JSON entry into the underlying type. The entry is expected to
-// contain a string corresponding to one of the enum's keys.
-func (t *Time) UnmarshalJSON(data []byte) error {
-	var value time.Time
-	if err := value.UnmarshalJSON(data); err != nil {
-		return err
-	}
-	*t = Time(value.UTC())
-	return nil
-}
-
-// MarshalJSON implements json.Marshaler.
-//
-// Marshals a Time into an RFC3339 time string.
-func (t Time) MarshalJSON() ([]byte, error) {
-	return t.Time().UTC().MarshalJSON()
-}