Fix cluster push secret existing store expectations

Signed-off-by: Moritz Johner <beller.moritz@googlemail.com>

pkg/controllers/clusterpushsecret/clusterpushsecret_controller_test.go

@@ -520,7 +520,6 @@ var _ = Describe("ClusterPushSecret controller", func() {
 							SecretStoreRefs: []v1alpha1.PushSecretStoreRef{
 								{
 									Name:       updateStoreName,
-									Kind:       "SecretStore",
 									APIVersion: "external-secrets.io/v1",
 								},
 							},