Eval should never return an error

Only awaiting eval should error.
Eval should always be available, even if using its methods returns errors.

packages/desktop/headless_tests/rendering.rs

@@ -38,7 +38,6 @@ fn use_inner_html(id: &'static str) -> Option<String> {
                     return element.innerHTML"#,
                 id
             ))
-            .unwrap()
             .await
             .unwrap();