Revert "Polymer elements added to third_party/polymer."

third_party/polymer/components/core-dropdown/core-dropdown.css

Index: third_party/polymer/components/core-dropdown/core-dropdown.css
diff --git a/third_party/polymer/components/core-dropdown/core-dropdown.css b/third_party/polymer/components/core-dropdown/core-dropdown.css
deleted file mode 100644
index ea2a6e383a06520a148956c53ba46e590d0ea1e4..0000000000000000000000000000000000000000
--- a/third_party/polymer/components/core-dropdown/core-dropdown.css
+++ /dev/null
@@ -1,36 +0,0 @@
-:host {
-  position: relative;
-  display: inline-block;
-  background-color: #fff;
-}
-
-#control core-item {
-  margin-left: 12px;
-  max-width: inherit;
-}
-
-#control core-item::shadow #label {
-  overflow: hidden;
-  /* FIXME not working for some reason */
-  white-space: nowrap;
-  text-overflow: ellipsis;
-}
-
-#arrow {
-  margin: 0 12px;
-}
-
-#menu {
-  position: absolute;
-  left: 0;
-  margin: 0;
-  padding: 0 12px;
-  overflow: scroll;
-  -webkit-overflow-scrolling: touch;
-  background-color: #fff;
-}
-
-:host([halign="right"]) #menu {
-  left: auto;
-  right: 0;
-}