diff --git a/lib/libc/resolv/resolv_mt.h b/lib/libc/resolv/resolv_mt.h
deleted file mode 100644
index 27963a12077a..000000000000
--- a/lib/libc/resolv/resolv_mt.h
+++ /dev/null
@@ -1,47 +0,0 @@
-#ifndef _RESOLV_MT_H
-#define _RESOLV_MT_H
-
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <arpa/nameser.h>
-#include <resolv.h>
-
-/* Access functions for the libresolv private interface */
-
-int	__res_enable_mt(void);
-int	__res_disable_mt(void);
-
-/* Per-thread context */
-
-typedef struct {
-int	no_hosts_fallback_private;
-int	retry_save;
-int	retry_private;
-char	inet_nsap_ntoa_tmpbuf[255*3];
-char	sym_ntos_unname[20];
-char	sym_ntop_unname[20];
-char	p_option_nbuf[40];
-char	p_time_nbuf[40];
-char	precsize_ntoa_retbuf[sizeof "90000000.00"];
-char	loc_ntoa_tmpbuf[sizeof
-"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
-char	p_secstodate_output[15];
-} mtctxres_t;
-
-/* Thread-specific data (TSD) */
-
-mtctxres_t	*___mtctxres(void);
-#define mtctxres	(___mtctxres())
-
-/* Various static data that should be TSD */
-
-#define sym_ntos_unname		(mtctxres->sym_ntos_unname)
-#define sym_ntop_unname		(mtctxres->sym_ntop_unname)
-#define inet_nsap_ntoa_tmpbuf	(mtctxres->inet_nsap_ntoa_tmpbuf)
-#define p_option_nbuf		(mtctxres->p_option_nbuf)
-#define p_time_nbuf		(mtctxres->p_time_nbuf)
-#define precsize_ntoa_retbuf	(mtctxres->precsize_ntoa_retbuf)
-#define loc_ntoa_tmpbuf		(mtctxres->loc_ntoa_tmpbuf)
-#define p_secstodate_output	(mtctxres->p_secstodate_output)
-
-#endif /* _RESOLV_MT_H */