Remove unused banner styles from uber_shared.css

This file is a copy of chrome/browser/resources/uber/uber_shared.css
Extensions cannot use chrome://theme/<IDR> images.
The .page-banner-text style using that is unused here.

Found while misguidedly attempting to use more chrome://theme/<IDR> in chrome/common/extensions/docs/examples/api files while working on https://codereview.chromium.org/11785037/.

BUG=NONE
TEST=Follow chrome/common/extensions/docs/README to test the changes; download and load unpacked FontSettings example extension, no appearance/functionality regressions.
R=falken@chromium.org,kalman@chromium.org

Review URL: https://chromiumcodereview.appspot.com/11783067

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176021 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/docs/examples/api/fontSettings/css/uber_shared.css

@@ -116,47 +116,3 @@ body.uber-frame section > h3 {
 body.uber-frame section > div:only-of-type {
   -webkit-box-flex: 1;
 }
-
-/* Styles for a hideable notification banner at the top of a page. */
-.page.showing-banner {
-  margin-top: 45px;
-}
-
-.page-banner {
-  background-color: white;
-  width: 100%;
-  z-index: 2;
-}
-
-.page:not(.showing-banner) .page-banner {
-  display: none;
-}
-
-.page-banner-gradient {
-  background: -webkit-linear-gradient(rgb(255, 242, 183),
-                                      rgb(250, 230, 145));
-  border: 1px solid rgb(201, 189, 141);
-  border-radius: 3px;
-  height: 25px;
-  margin: 9px 9px 0 9px;
-}
-
-.page-banner .page-banner-gradient {
-  -webkit-margin-end: 20px;
-  -webkit-margin-start: 0;
-  margin-bottom: 9px;
-}
-
-.page-banner-text {
-  background-image: url('chrome://theme/IDR_MANAGED');
-  background-position: 5px center;
-  background-repeat: no-repeat;
-  display: block;
-  line-height: 24px;
-  padding-left: 26px;
-}
-
-.page-banner.clickable:active .page-banner-text {
-  background: -webkit-linear-gradient(rgb(250, 230, 145),
-                                      rgb(255, 242, 183));
-}