diff --git a/src/libCom/osi/os/LynxOS/osdSock.h b/src/libCom/osi/os/LynxOS/osdSock.h
deleted file mode 100644
index c5a45266f..000000000
--- a/src/libCom/osi/os/LynxOS/osdSock.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/*************************************************************************\
-* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
-*     National Laboratory.
-* Copyright (c) 2002 The Regents of the University of California, as
-*     Operator of Los Alamos National Laboratory.
-* EPICS BASE Versions 3.13.7
-* and higher are distributed subject to a Software License Agreement found
-* in file LICENSE that is included with this distribution. 
-\*************************************************************************/
-
-/*
- * LynxOS specific socket include
- */
-
-#ifndef osdSockH
-#define osdSockH
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include <errno.h>
-
-#include <sys/types.h>
-#include <sys/param.h> /* for MAXHOSTNAMELEN */
-#include <sys/time.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <net/if.h>
-#include <netdb.h>
-#include <unistd.h> /* close() and others */
-
-#ifdef __cplusplus
-}
-#endif
- 
-typedef int SOCKET;
-#define INVALID_SOCKET (-1)
-#define SOCKERRNO errno
-
-#ifdef LYNXOS_RELEASE_2_4_0   /* only for LynxOS v2.4.0 */
-#	define socket_ioctl(A,B,C)     ioctl(A,B,(char *)C)
-#else
-#	define socket_ioctl(A,B,C)     ioctl(A,B,C)
-#endif
-
-typedef int osiSockIoctl_t;
-typedef int osiSocklen_t;
-
-#define FD_IN_FDSET(FD) ((FD)<FD_SETSIZE&&(FD)>=0)
-
-#define SOCK_EWOULDBLOCK EWOULDBLOCK
-#define SOCK_ENOBUFS ENOBUFS
-#define SOCK_ECONNRESET ECONNRESET
-#define SOCK_ETIMEDOUT ETIMEDOUT
-#define SOCK_EADDRINUSE EADDRINUSE
-#define SOCK_ECONNREFUSED ECONNREFUSED
-#define SOCK_ECONNABORTED ECONNABORTED
-#define SOCK_EINPROGRESS EINPROGRESS
-#define SOCK_EISCONN EISCONN
-#define SOCK_EALREADY EALREADY
-#define SOCK_EINVAL EINVAL
-#define SOCK_EINTR EINTR
-#define SOCK_EPIPE EPIPE
-#define SOCK_EMFILE EMFILE
-#define SOCK_SHUTDOWN ESHUTDOWN
-#define SOCK_ENOTSOCK ENOTSOCK
-#define SOCK_EBADF EBADF
-
-#define INADDR_LOOPBACK 0x7F000001
-
-#define ifreq_size(pifreq) (sizeof(pifreq->ifr_name))
-
-#endif /*osdSockH*/
-