remove FIXME now that simplify_enums is fixed

crates/fayalite/tests/module.rs

@@ -3357,10 +3357,6 @@ circuit check_enum_connect_any:
             connect o2, i2 @[module-XXXXXXXXXX.rs 11:1]
 ",
     };
-    // FIXME: simplify_enums is broken when connecting enums that contain
-    // UInt/SInt where their widths don't match. it should recurse into the
-    // enum bodies so it can properly sign/zero-extend or truncate the
-    // contained UInt/SInt fields.
     let orig_m = m.canonical().intern();
     let m = simplify_enums(orig_m, SimplifyEnumsKind::SimplifyToEnumsWithNoBody).unwrap();
     dbg!(m);