Move a bunch of ash-only vector icons to ash/.

ui/gfx/vector_icons/system_menu_bluetooth.1x.icon

Index: ui/gfx/vector_icons/system_menu_bluetooth.1x.icon
diff --git a/ui/gfx/vector_icons/system_menu_bluetooth.1x.icon b/ui/gfx/vector_icons/system_menu_bluetooth.1x.icon
deleted file mode 100644
index 12eb29716dc79b228730b76346f8aa43be171b33..0000000000000000000000000000000000000000
--- a/ui/gfx/vector_icons/system_menu_bluetooth.1x.icon
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright 2016 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.
-
-CANVAS_DIMENSIONS, 20,
-MOVE_TO, 10.5f, 1.5f,
-R_H_LINE_TO, -1,
-V_LINE_TO, 8,
-LINE_TO, 5.69f, 4.17f,
-LINE_TO, 4.5f, 5.34f,
-LINE_TO, 9.5f, 10,
-R_LINE_TO, -5, 4.66f,
-R_LINE_TO, 1.19f, 1.09f,
-LINE_TO, 9.5f, 12,
-R_V_LINE_TO, 6.5f,
-R_H_LINE_TO, 1,
-R_LINE_TO, 4.5f, -5,
-R_LINE_TO, -3.5f, -3.5f,
-LINE_TO, 15, 6.5f,
-R_LINE_TO, -4.5f, -5,
-CLOSE,
-R_MOVE_TO, 0.77f, 3.36f,
-R_LINE_TO, 1.59f, 1.57f,
-R_LINE_TO, -1.59f, 1.57f,
-V_LINE_TO, 4.86f,
-CLOSE,
-R_MOVE_TO, 0, 10.28f,
-R_V_LINE_TO, -3.13f,
-R_LINE_TO, 1.59f, 1.57f,
-R_LINE_TO, -1.59f, 1.57f,
-CLOSE,
-END