diff --git a/pkg/buildermgr/ns_watcher.go b/pkg/buildermgr/ns_watcher.go
index 94f2d7fa..2aada7d8 100644
--- a/pkg/buildermgr/ns_watcher.go
+++ b/pkg/buildermgr/ns_watcher.go
@@ -7,7 +7,6 @@ package buildermgr
 
 import (
 	"context"
-	"time"
 
 	"go.uber.org/zap"
 	"k8s.io/client-go/kubernetes"
diff --git a/pkg/executor/multitenant/ns_watcher.go b/pkg/executor/multitenant/ns_watcher.go
index d5dc0d41..a3b704b6 100644
--- a/pkg/executor/multitenant/ns_watcher.go
+++ b/pkg/executor/multitenant/ns_watcher.go
@@ -62,7 +62,6 @@ package multitenant
 import (
 	"context"
 	"errors"
-	"time"
 
 	"go.uber.org/zap"
 	"k8s.io/client-go/kubernetes"
diff --git a/pkg/router/ns_watcher.go b/pkg/router/ns_watcher.go
index 8162cddb..9a73ec0e 100644
--- a/pkg/router/ns_watcher.go
+++ b/pkg/router/ns_watcher.go
@@ -7,7 +7,6 @@ package router
 
 import (
 	"context"
-	"time"
 
 	"go.uber.org/zap"
 	"k8s.io/client-go/kubernetes"