Remove redundant set_panic_hook (merge issue)

Author: qinsoon

mmtk/src/lib.rs

@@ -131,40 +131,6 @@ extern "C" {
     pub static jl_true: *mut crate::julia_types::jl_value_t;
 }
 
-pub(crate) fn set_panic_hook() {
-    let old_hook = std::panic::take_hook();
-
-    std::panic::set_hook(Box::new(move |panic_info| {
-        if crate::collection::is_gc_thread() {
-            eprintln!("ERROR: An MMTk GC thread panicked.  This is a bug.");
-            eprintln!("{panic_info}");
-
-            let bt = std::backtrace::Backtrace::capture();
-            match bt.status() {
-                std::backtrace::BacktraceStatus::Unsupported => {
-                    eprintln!("Backtrace is unsupported.")
-                }
-                std::backtrace::BacktraceStatus::Disabled => {
-                    eprintln!("Backtrace is disabled.");
-                    eprintln!(
-                        "run with `RUST_BACKTRACE=1` environment variable to display a backtrace"
-                    );
-                }
-                std::backtrace::BacktraceStatus::Captured => {
-                    eprintln!("{bt}");
-                }
-                s => {
-                    eprintln!("Unknown backtrace status: {s:?}");
-                }
-            }
-
-            std::process::abort();
-        } else {
-            old_hook(panic_info);
-        }
-    }));
-}
-
 #[macro_export]
 macro_rules! early_return_for_non_moving_build {
     ($ret_val:expr) => {