annot-exclusion: TestRemoveUnstructuredKeys wasn't doing anything

Co-authored-by: Richard Wall <wallrj@users.noreply.github.com>

pkg/datagatherer/k8s/dynamic_test.go

@@ -1228,6 +1228,7 @@ func run_TestRemoveUnstructuredKeys(tc tc_RemoveUnstructuredKeys) func(*testing.
 	return func(t *testing.T) {
 		t.Helper()
 		RemoveUnstructuredKeys(toRegexps(tc.givenExclude), &unstructured.Unstructured{Object: tc.givenObj}, tc.givenPath...)
+		assert.Equal(t, tc.expectObj, tc.givenObj)
 	}
 }