Allow run_remote_tests to learn board instead of default board

run_remote_tests.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Script to run client or server tests on a live remote image.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
@@ skipping 14 matching lines @@
     fi
   done
 }
 
 find_common_sh
 . "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
 # --- END COMMON.SH BOILERPLATE ---
 
 . "${SCRIPT_ROOT}/remote_access.sh" || die "Unable to load remote_access.sh"
 
-get_default_board
-
 DEFINE_string args "" \
     "Command line arguments for test. Quoted and space separated if multiple." a
-DEFINE_string board "$DEFAULT_BOARD" \
+DEFINE_string board "" \
     "The board for which you are building autotest"
 DEFINE_boolean build ${FLAGS_FALSE} "Build tests while running" b
 DEFINE_string chroot "${DEFAULT_CHROOT_DIR}" "alternate chroot location" c
 DEFINE_boolean cleanup ${FLAGS_FALSE} "Clean up temp directory"
 DEFINE_integer iterations 1 "Iterations to run every top level test" i
 DEFINE_string results_dir_root "" "alternate root results directory"
 DEFINE_boolean verbose ${FLAGS_FALSE} "Show verbose autoserv output" v
 DEFINE_boolean use_emerged ${FLAGS_FALSE} \
     "Force use of emerged autotest packages"
 
@@ skipping 283 matching lines @@
 
   echo ""
   info "Test results:"
   ./generate_test_report "${TMP}" --strip="${TMP}/"
 
   print_time_elapsed
 }
 
 restart_in_chroot_if_needed "$@"
 main "$@"