make: unifdef SUN5_0 (defined)

*** 1170,1184 ****
                  posix  = true;
                          /* with posix on, use the posix get rule */
                  sccs_get_rule = sccs_get_posix_rule;
                          /* turn keep state off being SunPro make specific */
                  keep_state = false;
-                 #if defined(SUN5_0)
                  /* Use /usr/xpg4/bin/sh on Solaris */
                  MBSTOWCS(wcs_buffer, NOCATGETS("/usr/xpg4/bin/sh"));
                  (void) SETVAR(shell_name, GETNAME(wcs_buffer, FIND_LENGTH), false);
-                 #endif
                  if (trace_reader) {
                          (void) printf("%s:\n", posix_name->string_mb);
                  }
                  break;
  
--- 1170,1182 ----
*** 1923,1933 ****
                  (void) fprintf(stderr,
                                 catgets(catd, 1, 115, "Current working directory %s\n"),
                                 get_current_path());
          }
          (void) fflush(stderr);
- #if defined(SUN5_0) || defined(HP_UX)
          exit_status = 1;
- #endif
          exit(1);
  }
  
--- 1921,1929 ----