Hide the usage of `rb_io_t` where possible. (#7880)

This retries the compatible parts of the previously reverted PR so we can continue to update related code without breaking backwards compatibility.

1 files changed, 0 insertions, 1 deletions

diff --git a/file.c b/file.c
index 2c74f3eff5..5f59373a45 100644
--- a/file.c
+++ b/file.c
@@ -169,7 +169,6 @@ int flock(int, int);
 #include "internal/thread.h"
 #include "internal/vm.h"
 #include "ruby/encoding.h"
-#include "ruby/io.h"
 #include "ruby/thread.h"
 #include "ruby/util.h"