Tweak s390x resumption block

Author: alexcrichton

crates/wasmtime/src/runtime/vm/sys/unix/signals.rs

@@ -354,9 +354,6 @@ unsafe fn store_handler_in_ucontext(cx: *mut libc::c_void, handler: &Handler) {
             let cx = unsafe { cx.cast::<libc::ucontext_t>().as_mut().unwrap() };
             cx.uc_mcontext.psw.addr = handler.pc as _;
             cx.uc_mcontext.gregs[15] = handler.sp as _;
-            unsafe {
-                *(cx.uc_mcontext.gregs[15] as *mut usize) = handler.fp;
-            }
             cx.uc_mcontext.gregs[6] = 0;
             cx.uc_mcontext.gregs[7] = 0;
         } else if #[cfg(all(target_vendor = "apple", target_arch = "x86_64"))] {