Remove dead CSS from CrOS OOBE UI.

chrome/browser/resources/chromeos/login/oobe.css

 /* Copyright (c) 2012 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.
  *
  * This is the stylesheet used by the Out of the box experience (OOBE) flow,
  * sign in and lock screens.
  */
 
 html,
 body {
@@ skipping 879 matching lines @@
   bottom: 0;
   display: -webkit-box;
   left: 0;
   padding: 20px;
   position: fixed;
   right: 0;
   top: 0;
   z-index: 5;
 }
 
-#enroll-login-screen {
-  display: -webkit-box;
-  width: 630px;
-}
-
-#enroll-login-info {
-  width: 310px;
-}
-
-.enroll-login-item {
-  font-size: 0.9em;
-  margin: 16px 8px;
-}
-
-.enroll-login-item-content {
-  -webkit-margin-start: 52px;
-}
-
-.enroll-login-item-header {
-  font-weight: bold;
-  margin: 0 8px 0 0;
-}
-
-.enroll-login-item-image {
-  position: absolute;
-}
-
-#enroll-login-form {
-  height: 100%;
-  width: 310px;
-}
-
-#gaia-local-login {
-  border: none;
-  height: 100%;
-  vertical-align: top;
-  width: 100%;
-}
-
-#enroll-confirmation-screen {
-  bottom: 0;
-  left: 0;
-  position: absolute;
-  right: 0;
-  top: 0;
-}
-
-#enroll-confirmation-content {
-  height: 1.5em;
-  margin-top: -.75em;
-  position: absolute;
-  text-align: center;
-  top: 50%;
-  width: 100%;
-}
-
-#enroll-confirmation-image {
-  vertical-align: middle;
-}
-
-#enroll-confirmation-footer {
-  bottom: 0;
-  text-align: end;
-  width: 100%;
-}
-
 /* Styling for OAuth enrollment screen. */
 
 #oauth-enroll-container {
   display: -webkit-box;
 }
 
 #oauth-enroll-signin-frame {
   height: 456px;
 }
 
@@ skipping 109 matching lines @@
   color: #fff;
   font-size: 11px;
   margin: 10px;
   text-align: end;
   text-shadow:
       0 0 4px rgba(0,0,0,.6),
       0 1px 2px rgba(0,0,0,.8),
       0 -1px 2px rgba(0,0,0,1);
 }
 
-#notification-area {
-  color: #666;
-  position: absolute;
-  text-align: center;
-  top: 40px;
-  width: 100%;
-}
-
-#notification-area a {
-  color: rgb(37, 79, 155);
-}
-
-#notification-area .butter-bar {
-  margin: 0 auto;
-  max-width: 850px;
-}
-
 #background {
   -webkit-transition: 700ms opacity;
   background-size: 100% 100%;
   height: 100%;
   left: 0;
   position: absolute;
   top: 0;
   width: 100%;
 }
 
 .background-initial {
   opacity: 0;
 }
-
-.background-final {
-  opacity: 1;
-}
-