Revert "Polymer elements added to third_party/polymer."

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

-/*
-Copyright 2013 The Polymer Authors. All rights reserved.
-Use of this source code is governed by a BSD-style
-license that can be found in the LICENSE file.
-*/
-
-.core-h, .core-v {
-  display: -webkit-box !important;
-  display: -ms-flexbox !important;
-  display: -moz-flex !important;
-  display: -webkit-flex !important;
-  display: flex !important;
-}
-
-.core-h {
-  -webkit-box-orient: horizontal;
-  -ms-flex-direction: row;
-  -moz-flex-direction: row;
-  -webkit-flex-direction: row;
-  flex-direction: row;
-}
-
-.core-h.core-reverse {
-  -webkit-box-direction: reverse;
-  -ms-flex-direction: row-reverse;
-  -moz-flex-direction: row-reverse;
-  -webkit-flex-direction: row-reverse;
-  flex-direction: row-reverse;
-}
-
-.core-v {
-  -webkit-box-orient: vertical;
-  -ms-flex-direction: column;
-  -moz-flex-direction: column;
-  -webkit-flex-direction: column;
-  flex-direction: column;
-}
-
-.core-v.core-reverse {
-  -webkit-box-direction: reverse;
-  -ms-flex-direction: column-reverse;
-  -moz-flex-direction: column-reverse;
-  -webkit-flex-direction: column-reverse;
-  flex-direction: column-reverse;
-}
-
-.core-relative {
-  position: relative;
-}
-
-.core-fit {
-  position: absolute;
-  top: 0;
-  left: 0;
-  height: 100%;
-  width: 100%;
-}
-
-body.core-fit {
-  margin: 0;
-}
-
-.core-flex, [core-flex] {
-  -webkit-box-flex: 1;
-  -ms-flex: 1;
-  -moz-flex: 1;
-  -webkit-flex: 1;
-  flex: 1;
-}
-
-.core-flex-auto, [core-flex-auto] {
-  -webkit-box-flex: 1;
-  -ms-flex: 1 1 auto;
-  -moz-flex: 1 1 auto;
-  -webkit-flex: 1 1 auto;
-  flex: 1 1 auto;
-}
-
-.core-flex-none, [core-flex-none] {
-  -webkit-box-flex: none;
-  -ms-flex: none;
-  -moz-flex: none;
-  -webkit-flex: none;
-  flex: none;
-}
-
-.core-flex1, [core-flex=1] {
-  -webkit-box-flex: 1;
-  -ms-flex: 1;
-  -moz-flex: 1;
-  -webkit-flex: 1;
-  flex: 1;
-}
-
-.core-flex2, [core-flex=2] {
-  -webkit-box-flex: 2;
-  -ms-flex: 2;
-  -moz-flex: 2;
-  -webkit-flex: 2;
-  flex: 2;
-}
-
-.core-flex3, [core-flex=3] {
-  -webkit-box-flex: 3;
-  -ms-flex: 3;
-  -moz-flex: 3;
-  -webkit-flex: 3;
-  flex: 3;
-}
-
-/* distributed elements */
-::content > .core-flex, ::content > [core-flex] {
-  -webkit-box-flex: 1;
-  -ms-flex: 1;
-  -moz-flex: 1;
-  -webkit-flex: 1;
-  flex: 1;
-}
-
-::content > .core-flex-auto, ::content > [core-flex-auto] {
-  -webkit-box-flex: 1;
-  -ms-flex: 1 1 auto;
-  -moz-flex: 1 1 auto;
-  -webkit-flex: 1 1 auto;
-  flex: 1 1 auto;
-}
-
-::content > .core-flex-none, ::content > [core-flex-none] {
-  -webkit-box-flex: none;
-  -ms-flex: none;
-  -moz-flex: none;
-  -webkit-flex: none;
-  flex: none;
-}
-
-::content > .core-flex1, ::content > [core-flex=1] {
-  -webkit-box-flex: 1;
-  -ms-flex: 1;
-  -moz-flex: 1;
-  -webkit-flex: 1;
-  flex: 1;
-}
-
-::content > .core-flex2, ::content > [core-flex=2] {
-  -webkit-box-flex: 2;
-  -ms-flex: 2;
-  -moz-flex: 2;
-  -webkit-flex: 2;
-  flex: 2;
-}
-
-::content > .core-flex3, ::content > [core-flex=3] {
-  -webkit-box-flex: 3;
-  -ms-flex: 3;
-  -moz-flex: 3;
-  -webkit-flex: 3;
-  flex: 3;
-}
-
-/* alignment in main axis */
-.core-justify-start {
-  -webkit-box-pack: start;
-  -ms-flex-pack: start;
-  -moz-justify-content: flex-start;
-  -webkit-justify-content: flex-start;
-  justify-content: flex-start;
-}
-
-.core-justify-center {
-  -webkit-box-pack: center;
-  -ms-flex-pack: center;
-  -moz-justify-content: center;
-  -webkit-justify-content: center;
-  justify-content: center;
-}
-
-.core-justify-end {
-  -webkit-box-pack: end;
-  -ms-flex-pack: end;
-  -moz-justify-content: flex-end;
-  -webkit-justify-content: flex-end;
-  justify-content: flex-end;
-}
-
-.core-justify-between {
-  -webkit-box-pack: justify;
-  -ms-flex-pack: justify;
-  -moz-justify-content: space-between;
-  -webkit-justify-content: space-between;
-  justify-content: space-between;
-}
-
-/* alignment in cross axis */
-.core-align-start {
-  -webkit-box-align: start;
-  -ms-flex-align: start;
-  -moz-align-items: flex-start;
-  -webkit-align-items: flex-start;
-  align-items: flex-start;
-}
-
-.core-align-center {
-  -webkit-box-align: center;
-  -ms-flex-align: center;
-  -moz-align-items: center;
-  -webkit-align-items: center;
-  align-items: center;
-}
-
-.core-align-end {
-  -webkit-box-align: end;
-  -ms-flex-align: end;
-  -moz-align-items: flex-end;
-  -webkit-align-items: flex-end;
-  align-items: flex-end;
-}