Restore ignore tag

This test case actually requires std::process.

src/test/ui/iterators/iter-sum-overflow-debug.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes
 
 use std::panic;