Use more minimized test.

Author: cjgillot

tests/ui/impl-trait/in-trait/late-bound-in-object-assocty.rs

@@ -1,12 +1,12 @@
 // Test for issue #132429
 //@compile-flags: -Zunstable-options --edition=2024
+//@check-pass
 
-traitThreeCellFragment{
-fnext_cells<'a>(
-&'aself,
-) -> dyn core::future::Future<Output = implIntoIterator<Item = u32>> + 'a{
-//~^ ERROR mismatched types
-//~| ERROR return type cannot have an unboxed trait object
+use std::future::Future;
+
+traitTest{
+fnfoo<'a>(&'aself) -> Box<dynFuture<Output = implIntoIterator<Item = u32>>>{
+Box::new(async{[]})
 }
 }