Remove utility functions: `mrb_vm_iv_{get,set}`.

include/mruby/variable.h

@@ -31,8 +31,6 @@ struct global_entry {
 
 mrb_value mrb_vm_special_get(mrb_state*, mrb_sym);
 void mrb_vm_special_set(mrb_state*, mrb_sym, mrb_value);
-mrb_value mrb_vm_iv_get(mrb_state*, mrb_sym);
-void mrb_vm_iv_set(mrb_state*, mrb_sym, mrb_value);
 mrb_value mrb_vm_cv_get(mrb_state*, mrb_sym);
 void mrb_vm_cv_set(mrb_state*, mrb_sym, mrb_value);
 mrb_value mrb_vm_const_get(mrb_state*, mrb_sym);

src/variable.c

@@ -498,20 +498,6 @@ mrb_iv_remove(mrb_state *mrb, mrb_value obj, mrb_sym sym)
   return mrb_undef_value();
 }
 
-mrb_value
-mrb_vm_iv_get(mrb_state *mrb, mrb_sym sym)
-{
-  /* get self */
-  return mrb_iv_get(mrb, mrb->c->stack[0], sym);
-}
-
-void
-mrb_vm_iv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
-{
-  /* get self */
-  mrb_iv_set(mrb, mrb->c->stack[0], sym, v);
-}
-
 static int
 iv_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
 {

src/vm.c

@@ -1131,8 +1131,7 @@ RETRY_TRY_BLOCK:
     }
 
     CASE(OP_GETIV, BB) {
-      mrb_value val = mrb_vm_iv_get(mrb, syms[b]);
-      regs[a] = val;
+      regs[a] = mrb_vm_iv_get(mrb, syms[b]);
       NEXT;
     }