feat: get rid of gc and cyclic thunk

src/stack.rs

@@ -1,8 +1,6 @@
 use std::mem::{MaybeUninit, replace, transmute};
 use std::ops::Deref;
 
-use gc_arena::Collect;
-
 use crate::error::*;
 
 macro_rules! into {
@@ -20,13 +18,6 @@ pub struct Stack<T, const CAP: usize> {
     top: usize,
 }
 
-unsafe impl<'gc, T: Collect<'gc>, const CAP: usize> Collect<'gc> for Stack<T, CAP> {
-    fn trace<Tr: gc_arena::collect::Trace<'gc>>(&self, cc: &mut Tr) {
-        for v in self.iter() {
-            v.trace(cc);
-        }
-    }
-}
 
 impl<T, const CAP: usize> Default for Stack<T, CAP> {
     fn default() -> Self {