remove redundant log messages

Signed-off-by: kkkkun <scuzk373x@gmail.com>

pkg/osutil/interrupt_unix.go

@@ -23,6 +23,8 @@ import (
 	"sync"
 	"syscall"
 
+	"go.etcd.io/etcd/client/pkg/v3/verify"
+
 	"go.uber.org/zap"
 )
 
@@ -47,6 +49,7 @@ func RegisterInterruptHandler(h InterruptHandler) {
 
 // HandleInterrupts calls the handler functions on receiving a SIGINT or SIGTERM.
 func HandleInterrupts(lg *zap.Logger) {
+	verify.Assert(lg != nil, "the logger should not be nil")
 	notifier := make(chan os.Signal, 1)
 	signal.Notify(notifier, syscall.SIGINT, syscall.SIGTERM)
 
@@ -60,9 +63,7 @@ func HandleInterrupts(lg *zap.Logger) {
 
 		interruptExitMu.Lock()
 
-		if lg != nil {
-			lg.Info("received signal; shutting down", zap.String("signal", sig.String()))
-		}
+		lg.Info("received signal; shutting down", zap.String("signal", sig.String()))
 
 		for _, h := range ihs {
 			h()