Adjust MD shelf app list icon for better centering.

ash/resources/vector_icons/shelf_app_list.icon

Index: ash/resources/vector_icons/shelf_app_list.icon
diff --git a/ash/resources/vector_icons/shelf_app_list.icon b/ash/resources/vector_icons/shelf_app_list.icon
deleted file mode 100644
index a198bfb626412a71a20b2091f6ba504f9d2df846..0000000000000000000000000000000000000000
--- a/ash/resources/vector_icons/shelf_app_list.icon
+++ /dev/null
@@ -1,18 +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, 26,
-MOVE_TO, 13, 26,
-R_CUBIC_TO, 7.18f, 0, 13, -5.82f, 13, -13,
-CUBIC_TO_SHORTHAND, 20.18f, 0, 13, 0,
-CUBIC_TO_SHORTHAND, 0, 5.82f, 0, 13,
-R_CUBIC_TO, 0, 7.18f, 5.82f, 13, 13, 13,
-CLOSE,
-R_MOVE_TO, 0, -3,
-R_CUBIC_TO, 5.52f, 0, 10, -4.48f, 10, -10,
-CUBIC_TO_SHORTHAND, 18.52f, 3, 13, 3,
-CUBIC_TO_SHORTHAND, 3, 7.48f, 3, 13,
-R_CUBIC_TO, 0, 5.52f, 4.48f, 10, 10, 10,
-CLOSE,
-END