1 files changed, 0 insertions, 5 deletions
diff --git a/thread.c b/thread.c
index 9008467206..9357d14b8a 100644
--- a/thread.c
+++ b/thread.c
@@ -778,11 +778,6 @@ thread_do_start(rb_thread_t *th)
 
 void rb_ec_clear_current_thread_trace_func(const rb_execution_context_t *ec);
 
-// io.c
-VALUE rb_io_prep_stdin(void);
-VALUE rb_io_prep_stdout(void);
-VALUE rb_io_prep_stderr(void);
-
 static int
 thread_start_func_2(rb_thread_t *th, VALUE *stack_start)
 {