Revert "Polymer elements added to third_party/polymer."

third_party/polymer/components/core-menu/core-submenu.css

Index: third_party/polymer/components/core-menu/core-submenu.css
diff --git a/third_party/polymer/components/core-menu/core-submenu.css b/third_party/polymer/components/core-menu/core-submenu.css
deleted file mode 100644
index 54c7f5bf5c9946d5183545e5969d079acc22e719..0000000000000000000000000000000000000000
--- a/third_party/polymer/components/core-menu/core-submenu.css
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
-This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE
-The complete set of authors may be found at http://polymer.github.io/AUTHORS
-The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
-Code distributed by Google as part of the polymer project is also
-subject to an additional IP rights grant found at http://polymer.github.io/PATENTS
-*/
-
-:host { 
-  display: block;
-  height: auto;
-}
-
-:host(.core-selected, [active]) {
-  font-weight: initial;
-}
-
-core-item {
-  cursor: default;
-}
-
-::content > core-item {
- cursor: default; 
-}
-
-#submenu {
-  margin: 0 0 0 44px;
-}