Remove wrong assertion which causes ICE

Signed-off-by: FedericoBruzzone <federico.bruzzone.i@gmail.com>

compiler/rustc_ty_utils/src/layout.rs

@@ -104,11 +104,6 @@ fn map_error<'tcx>(
             // This is sometimes not a compile error if there are trivially false where clauses.
             // See `tests/ui/layout/trivial-bounds-sized.rs` for an example.
             assert!(field.layout.is_unsized(), "invalid layout error {err:#?}");
-            if !field.ty.is_sized(cx.tcx(), cx.typing_env) {
-                cx.tcx().dcx().delayed_bug(format!(
-                    "encountered unexpected unsized field in layout of {ty:?}: {field:#?}"
-                ));
-            }
             if cx.tcx().features().trivial_bounds() {
                 LayoutError::UnexpectedUnsized(ty)
             } else {