Don't defer t.Cleanup

Author: bduffany

openfeature/openfeature_test.go

@@ -588,7 +588,7 @@ func TestRequirement_1_6_1(t *testing.T) {
 // The API's `shutdown` function MUST reset all state of the API, removing all
 // hooks, event handlers, and providers.
 func TestRequirement_1_6_2(t *testing.T) {
-	defer t.Cleanup(initSingleton)
+	t.Cleanup(initSingleton)
 
 	// TODO: test that hooks and event handlers are removed as well. This only
 	// tests that providers are removed.