Revert "Fix `SIGSEGV` with mruby-method + mruby-catch"

src/vm.c

@@ -780,25 +780,8 @@ mrb_yield_with_class(mrb_state *mrb, mrb_value b, mrb_int argc, const mrb_value
   mrb->c->ci->stack[argc+1] = mrb_nil_value();
 
   if (MRB_PROC_CFUNC_P(p)) {
-    struct mrb_jmpbuf *prev_jmp = mrb->jmp;
-    struct mrb_jmpbuf c_jmp;
-    int ai = mrb_gc_arena_save(mrb);
-    mrb_bool exc = FALSE;
-
-    MRB_TRY(&c_jmp) {
-      mrb->jmp = &c_jmp;
-      ci->acc = CI_ACC_DIRECT;
-      val = MRB_PROC_CFUNC(p)(mrb, self);
-    }
-    MRB_CATCH(&c_jmp) {
-      exc = TRUE;
-    }
-    MRB_END_EXC(&c_jmp);
-
-    mrb->jmp = prev_jmp;
-    mrb_gc_arena_restore(mrb, ai);
+    val = MRB_PROC_CFUNC(p)(mrb, self);
     cipop(mrb);
-    if (exc) MRB_THROW(mrb->jmp);
   }
   else {
     val = mrb_run(mrb, p, self);