Revert "add node shutdown taint"

pkg/controller/testutil/test_utils.go

@@ -67,7 +67,6 @@ type FakeNodeHandler struct {
 	// Synchronization
 	lock           sync.Mutex
 	DeleteWaitChan chan struct{}
-	PatchWaitChan  chan struct{}
 }
 
 // FakeLegacyHandler is a fake implemtation of CoreV1Interface.
@@ -271,9 +270,6 @@ func (m *FakeNodeHandler) Patch(name string, pt types.PatchType, data []byte, su
 	m.lock.Lock()
 	defer func() {
 		m.RequestCount++
-		if m.PatchWaitChan != nil {
-			m.PatchWaitChan <- struct{}{}
-		}
 		m.lock.Unlock()
 	}()
 	var nodeCopy v1.Node