provider/google: storage bucket tests shouldn't not check predefined_acl

it was depreceted in https://github.com/hashicorp/terraform/pull/3272

builtin/providers/google/resource_storage_bucket_test.go

@@ -52,8 +52,6 @@ func TestAccStorageCustomAttributes(t *testing.T) {
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckCloudStorageBucketExists(
 						"google_storage_bucket.bucket", &bucketName),
-					resource.TestCheckResourceAttr(
-						"google_storage_bucket.bucket", "predefined_acl", "publicReadWrite"),
 					resource.TestCheckResourceAttr(
 						"google_storage_bucket.bucket", "location", "EU"),
 					resource.TestCheckResourceAttr(
@@ -77,8 +75,6 @@ func TestAccStorageBucketUpdate(t *testing.T) {
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckCloudStorageBucketExists(
 						"google_storage_bucket.bucket", &bucketName),
-					resource.TestCheckResourceAttr(
-						"google_storage_bucket.bucket", "predefined_acl", "projectPrivate"),
 					resource.TestCheckResourceAttr(
 						"google_storage_bucket.bucket", "location", "US"),
 					resource.TestCheckResourceAttr(