Update go dependencies (#2234)

vendor/github.com/emicklei/go-restful/log/log.go

@@ -1,34 +0,0 @@
-package log
-
-import (
-	stdlog "log"
-	"os"
-)
-
-// StdLogger corresponds to a minimal subset of the interface satisfied by stdlib log.Logger
-type StdLogger interface {
-	Print(v ...interface{})
-	Printf(format string, v ...interface{})
-}
-
-var Logger StdLogger
-
-func init() {
-	// default Logger
-	SetLogger(stdlog.New(os.Stderr, "[restful] ", stdlog.LstdFlags|stdlog.Lshortfile))
-}
-
-// SetLogger sets the logger for this package
-func SetLogger(customLogger StdLogger) {
-	Logger = customLogger
-}
-
-// Print delegates to the Logger
-func Print(v ...interface{}) {
-	Logger.Print(v...)
-}
-
-// Printf delegates to the Logger
-func Printf(format string, v ...interface{}) {
-	Logger.Printf(format, v...)
-}