Make luci-go compile again after deps.lock roll.

common/cloudlogging/severity.go

Index: common/cloudlogging/severity.go
diff --git a/common/cloudlogging/severity.go b/common/cloudlogging/severity.go
deleted file mode 100644
index 3b2119d6aed34f22f9910a543b93054522532e0b..0000000000000000000000000000000000000000
--- a/common/cloudlogging/severity.go
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright 2015 The LUCI Authors. All rights reserved.
-// Use of this source code is governed under the Apache License, Version 2.0
-// that can be found in the LICENSE file.
-
-package cloudlogging
-
-import (
-	"errors"
-	"strings"
-)
-
-// Severity defines how important a message is.
-type Severity string
-
-// All severity types understood by Cloud Logging.
-const (
-	Default   Severity = "DEFAULT"
-	Debug     Severity = "DEBUG"
-	Info      Severity = "INFO"
-	Notice    Severity = "NOTICE"
-	Warning   Severity = "WARNING"
-	Error     Severity = "ERROR"
-	Critical  Severity = "CRITICAL"
-	Alert     Severity = "ALERT"
-	Emergency Severity = "EMERGENCY"
-)
-
-var knownSeverity = []Severity{
-	Default,
-	Debug,
-	Info,
-	Notice,
-	Warning,
-	Error,
-	Critical,
-	Alert,
-	Emergency,
-}
-
-// Validate returns a error if the severity is not recognized.
-func (sev Severity) Validate() error {
-	for _, k := range knownSeverity {
-		if sev == k {
-			return nil
-		}
-	}
-	return errors.New("cloudlog: unknown severity")
-}
-
-// String is used by 'flag' package.
-func (sev Severity) String() string {
-	return string(sev)
-}
-
-// Set is called by 'flag' package when parsing command line options.
-func (sev *Severity) Set(value string) error {
-	val := Severity(strings.ToUpper(value))
-	if err := val.Validate(); err != nil {
-		return err
-	}
-	*sev = val
-	return nil
-}