deprecate embedded browser (#12163)

https://github.com/minio/console takes over the functionality for the
future object browser development

Signed-off-by: Harshavardhana <harsha@minio.io>

browser/app/less/inc/alert.less

@@ -1,68 +0,0 @@
-.alert {
-    border: 0;
-    position: fixed;
-    max-width: 500px;
-    margin: 0;
-    box-shadow: 0 4px 5px rgba(0, 0, 0, 0.1);
-    color: @white;
-    width: 100%;
-    right: 20px;
-    border-radius: 3px;
-    padding: 17px 50px 17px 17px;
-    z-index: 10010;
-    .animation-duration(800ms);
-    .animation-fill-mode(both);
-
-    &:not(.progress) {
-        top: 20px;
-
-        @media(min-width: (@screen-sm-min)) {
-            left: 50%;
-            margin-left: -250px;
-        }
-    }
-
-    &.progress {
-        bottom: 20px;
-        right: 20px;
-    }
-
-    &.alert-danger {
-        background: @red;
-    }
-
-    &.alert-success {
-        background: @green;
-    }
-
-    &.alert-info {
-        background: @blue;
-    }
-
-    @media(max-width: (@screen-xs-max)) {
-        left: 20px;
-        width: ~"calc(100% - 40px)";
-        max-width: 100%;
-    }
-
-    .progress {
-        margin: 10px 10px 8px 0;
-        height: 5px;
-        box-shadow: none;
-        border-radius: 1px;
-        background-color: @blue;
-        border-radius: 2px;
-        overflow: hidden;
-    }
-
-    .progress-bar {
-        box-shadow: none;
-        background-color: @white;
-        height: 100%;
-    }
-
-    .close {
-        position: absolute;
-        top: 15px;
-    }
-}