fix maintnotif pool hook

maintnotifications/pool_hook.go

@@ -174,6 +174,10 @@ func (ph *PoolHook) OnPut(ctx context.Context, conn *pool.Conn) (shouldPool bool
 	return true, false, nil
 }
 
+func (ph *PoolHook) OnRemove(_ context.Context, _ *pool.Conn, _ error) {
+	// Not used
+}
+
 // Shutdown gracefully shuts down the processor, waiting for workers to complete
 func (ph *PoolHook) Shutdown(ctx context.Context) error {
 	return ph.workerManager.shutdownWorkers(ctx)

redis.go

@@ -217,9 +217,7 @@ type baseClient struct {
 	pubSubPool *pool.PubSubPool
 	hooksMixin
 
-	onClose      func() error // hook called when client is closed
+	onClose func() error // hook called when client is closed
-	onCloseSlice []func() error
-	onCloseMu    sync.Mutex
 
 	// Push notification processing
 	pushProcessor push.NotificationProcessor