diff --git a/google/resource_google_project.go b/google/resource_google_project.go
index 4e3b8d48..00fc7185 100644
--- a/google/resource_google_project.go
+++ b/google/resource_google_project.go
@@ -103,7 +103,6 @@ func resourceGoogleProject() *schema.Resource {
 
 func appEngineResource() *schema.Resource {
 	return &schema.Resource{
-		CustomizeDiff: resourceGoogleProjectAppEngineCustomizeDiff,
 		Schema: map[string]*schema.Schema{
 			"auth_domain": &schema.Schema{
 				Type:     schema.TypeString,
@@ -217,10 +216,6 @@ func resourceGoogleProjectCustomizeDiff(diff *schema.ResourceDiff, meta interfac
 	return nil
 }
 
-func resourceGoogleProjectAppEngineCustomizeDiff(diff *schema.ResourceDiff, meta interface{}) error {
-	return nil
-}
-
 func resourceGoogleProjectCreate(d *schema.ResourceData, meta interface{}) error {
 	config := meta.(*Config)