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

*** 18,27 ****
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  
  /*
+  * Copyright 2017 Gary Mills
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
*** 122,132 ****
                                  break;
                          }
  
                  case TCOM:
                          {
!                                 unsigned char   *a1, *name;
                                  int     argn, internal;
                                  struct argnod   *schain = gchain;
                                  struct ionod    *io = t->treio;
                                  short   cmdhash;
                                  short   comtype;
--- 123,133 ----
                                  break;
                          }
  
                  case TCOM:
                          {
!                                 unsigned char   *name;
                                  int     argn, internal;
                                  struct argnod   *schain = gchain;
                                  struct ionod    *io = t->treio;
                                  short   cmdhash;
                                  short   comtype;
*** 134,144 ****
                                  exitval = 0;
  
                                  gchain = 0;
                                  argn = getarg(t);
                                  com = scan(argn);
-                                 a1 = com[1];
                                  gchain = schain;
  
                                  if (argn != 0)
                                          cmdhash = pathlook(com[0], 1, comptr(t)->comset);
  
--- 135,144 ----