Remove unused earcons

chrome/browser/resources/chromeos/chromevox/chromevox_assets.gypi

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromevox_assets_chromevox': [
       'chromevox/chromevox-128.png',
       'chromevox/chromevox-16.png',
       'chromevox/chromevox-19.png',
       'chromevox/chromevox-48.png',
     ],
     'chromevox_assets_chromevox_background_earcons': [
       'chromevox/background/earcons/alert_modal.ogg',
       'chromevox/background/earcons/alert_nonmodal.ogg',
       'chromevox/background/earcons/bullet.ogg',
       'chromevox/background/earcons/busy_progress_loop.ogg',
-      'chromevox/background/earcons/busy_working_loop.ogg',
       'chromevox/background/earcons/button.ogg',
       'chromevox/background/earcons/check_off.ogg',
       'chromevox/background/earcons/check_on.ogg',
-      'chromevox/background/earcons/collapsed.ogg',
       'chromevox/background/earcons/editable_text.ogg',
-      'chromevox/background/earcons/ellipsis.ogg',
-      'chromevox/background/earcons/expanded.ogg',
       'chromevox/background/earcons/font_change.ogg',
       'chromevox/background/earcons/invalid_keypress.ogg',
       'chromevox/background/earcons/link.ogg',
       'chromevox/background/earcons/listbox.ogg',
       'chromevox/background/earcons/long_desc.ogg',
-      'chromevox/background/earcons/new_mail.ogg',
       'chromevox/background/earcons/object_close.ogg',
-      'chromevox/background/earcons/object_delete.ogg',
-      'chromevox/background/earcons/object_deselect.ogg',
       'chromevox/background/earcons/object_enter.ogg',
       'chromevox/background/earcons/object_exit.ogg',
       'chromevox/background/earcons/object_open.ogg',
       'chromevox/background/earcons/object_select.ogg',
       'chromevox/background/earcons/paragraph_break.ogg',
-      'chromevox/background/earcons/search_hit.ogg',
-      'chromevox/background/earcons/search_miss.ogg',
-      'chromevox/background/earcons/section.ogg',
       'chromevox/background/earcons/selection.ogg',
       'chromevox/background/earcons/selection_reverse.ogg',
       'chromevox/background/earcons/special_content.ogg',
       'chromevox/background/earcons/task_success.ogg',
       'chromevox/background/earcons/wrap_edge.ogg',
       'chromevox/background/earcons/wrap.ogg',
     ],
     'chromevox_assets_chromevox_background_keymaps': [
       'chromevox/background/keymaps/classic_keymap.json',
       'chromevox/background/keymaps/experimental.json',
@@ skipping 66 matching lines @@
         {
           'destination': '<(chromevox_dest_dir)/chromevox/background/mathmaps/symbols',
           'files': [
             '<@(chromevox_assets_chromevox_background_mathmaps_symbols)',
           ],
         },
       ],
     },
   ],
 }