diff --git a/pkg/buildermgr/ns_watcher.go b/pkg/buildermgr/ns_watcher.go
index 94f2d7fa5..2aada7d85 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 d5dc0d417..a3b704b6f 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 8162cddbf..9a73ec0ec 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"