3 files changed, 1 insertions, 9 deletions
diff --git a/gc.c b/gc.c
index c7e9754ab6..4d78b85543 100644
--- a/gc.c
+++ b/gc.c
@@ -2435,13 +2435,6 @@ rb_imemo_new(enum imemo_type type, VALUE v1, VALUE v2, VALUE v3, VALUE v0)
     return newobj_of(v0, flags, v1, v2, v3, TRUE);
 }
 
-rb_ast_t *
-rb_imemo_ast_new(VALUE node_buffer)
-{
-    VALUE flags = T_IMEMO | (imemo_ast << FL_USHIFT);
-    return (rb_ast_t *)newobj_of(node_buffer, flags, 0, 0, 0, FALSE);
-}
-
 static VALUE
 rb_imemo_tmpbuf_new(VALUE v1, VALUE v2, VALUE v3, VALUE v0)
 {
diff --git a/internal/imemo.h b/internal/imemo.h
index 102356c78c..a9e2136ac4 100644
--- a/internal/imemo.h
+++ b/internal/imemo.h
@@ -130,7 +130,6 @@ struct MEMO {
 
 typedef struct rb_imemo_tmpbuf_struct rb_imemo_tmpbuf_t;
 VALUE rb_imemo_new(enum imemo_type type, VALUE v1, VALUE v2, VALUE v3, VALUE v0);
-struct rb_ast_struct *rb_imemo_ast_new(VALUE node_buffer);
 rb_imemo_tmpbuf_t *rb_imemo_tmpbuf_parser_heap(void *buf, rb_imemo_tmpbuf_t *old_heap, size_t cnt);
 struct vm_ifunc *rb_vm_ifunc_new(rb_block_call_func_t func, const void *data, int min_argc, int max_argc);
 void rb_strterm_mark(VALUE obj);
diff --git a/node.c b/node.c
index 2392d5b8d1..bef9d7bcbd 100644
--- a/node.c
+++ b/node.c
@@ -1299,7 +1299,7 @@ rb_ast_t *
 rb_ast_new(void)
 {
     node_buffer_t *nb = rb_node_buffer_new();
-    rb_ast_t *ast = rb_imemo_ast_new((VALUE)nb);
+    rb_ast_t *ast = (rb_ast_t *)rb_imemo_new(imemo_ast, 0, 0, 0, (VALUE)nb);
     return ast;
 }