8485 Remove set but unused variables in usr/src/cmd

*** 18,27 ****
--- 18,28 ----
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
+  * Copyright 2017 Gary Mills
   * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
*** 35,46 ****
   * University Acknowledgment- Portions of this document are derived from
   * software developed by the University of California, Berkeley, and its
   * contributors.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include "talk.h"
  #include "ctl.h"
  #include <locale.h>
  #include <pwd.h>
  #include <sys/systeminfo.h>
--- 36,45 ----
*** 63,73 ****
          char hostname[HOST_NAME_LENGTH + 1];
          char *rem_name;
          char *my_name;
          char *my_machine_name;
          char *rem_machine_name;
-         char *my_tty;
          char *rem_tty;
          char *ptr;
          int name_length;
  
          if (argc < 2) {
--- 62,71 ----
*** 100,111 ****
  
          name_length = HOST_NAME_LENGTH;
          (void) sysinfo(SI_HOSTNAME, hostname, name_length);
          my_machine_name = hostname;
  
-         my_tty = strrchr(ttyname(0), '/') + 1;
- 
          /*
           * check for, and strip out, the machine name of the target
           */
  
          for (ptr = argv[1]; *ptr != '\0' &&
--- 98,107 ----