diff --git a/src/os/error.go b/src/os/error.go
index fe8f2a8446..9827446e65 100644
--- a/src/os/error.go
+++ b/src/os/error.go
@@ -5,7 +5,6 @@
 package os
 
 import (
-	"internal/oserror"
 	"internal/poll"
 	"io/fs"
 )
@@ -28,7 +27,6 @@ var (
 	ErrDeadlineExceeded = errDeadlineExceeded() // "i/o timeout"
 )
 
-func errClosed() error     { return oserror.ErrClosed }
 func errNoDeadline() error { return poll.ErrNoDeadline }
 
 // errDeadlineExceeded returns the value for os.ErrDeadlineExceeded.