diff --git a/pkg/controller/context.go b/pkg/controller/context.go
index 6be95a4c6..abdfdc72c 100644
--- a/pkg/controller/context.go
+++ b/pkg/controller/context.go
@@ -6,7 +6,7 @@ import (
 
 	clientset "github.com/jetstack-experimental/cert-manager/pkg/client/clientset"
 	"github.com/jetstack-experimental/cert-manager/pkg/issuer"
-	"github.com/jetstack-experimental/cert-manager/pkg/kube"
+	"github.com/jetstack-experimental/cert-manager/pkg/util/kube"
 )
 
 // Context contains various types that are used by controller implementations.
diff --git a/pkg/kube/factory.go b/pkg/kube/factory.go
deleted file mode 100644
index df89d52e8..000000000
--- a/pkg/kube/factory.go
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
-Copyright 2017 Jetstack Ltd.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package kube
-
-import (
-	sync "sync"
-
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	cache "k8s.io/client-go/tools/cache"
-)
-
-type SharedInformerFactory interface {
-	InformerFor(string, metav1.GroupVersionKind, cache.SharedIndexInformer) cache.SharedIndexInformer
-	Start(<-chan struct{})
-}
-
-var DefaultSharedInformerFactory = NewSharedInformerFactory()
-
-type sharedInformerFactory struct {
-	lock             sync.Mutex
-	informers        map[string]map[metav1.GroupVersionKind]cache.SharedIndexInformer
-	startedInformers map[string]map[metav1.GroupVersionKind]bool
-}
-
-var _ SharedInformerFactory = &sharedInformerFactory{}
-
-func NewSharedInformerFactory() SharedInformerFactory {
-	return &sharedInformerFactory{
-		informers:        make(map[string]map[metav1.GroupVersionKind]cache.SharedIndexInformer),
-		startedInformers: make(map[string]map[metav1.GroupVersionKind]bool),
-	}
-}
-
-func (s *sharedInformerFactory) InformerFor(namespace string, gvk metav1.GroupVersionKind, i cache.SharedIndexInformer) cache.SharedIndexInformer {
-	s.lock.Lock()
-	defer s.lock.Unlock()
-	if s.informers == nil {
-		s.informers = make(map[string]map[metav1.GroupVersionKind]cache.SharedIndexInformer)
-	}
-	informerMap, nsExists := s.informers[namespace]
-	if !nsExists {
-		s.informers[namespace] = map[metav1.GroupVersionKind]cache.SharedIndexInformer{
-			gvk: i,
-		}
-		return i
-	}
-	informer, exists := informerMap[gvk]
-	if !exists {
-		informerMap[gvk] = i
-		return i
-	}
-	return informer
-}
-
-// Start initializes all requested informers.
-func (f *sharedInformerFactory) Start(stopCh <-chan struct{}) {
-	f.lock.Lock()
-	defer f.lock.Unlock()
-
-	for namespace, informerMap := range f.informers {
-		startedMap, exists := f.startedInformers[namespace]
-		if !exists {
-			startedMap = make(map[metav1.GroupVersionKind]bool)
-			f.startedInformers[namespace] = startedMap
-		}
-		for informerType, informer := range informerMap {
-			if !startedMap[informerType] {
-				go informer.Run(stopCh)
-				startedMap[informerType] = true
-			}
-		}
-	}
-}