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/dropdown.less

@@ -1,26 +0,0 @@
-.dropdown-menu {
-    padding: 15px 0;
-    top: 0;
-    margin-top: -1px;
-
-    & > li {
-        & > a {
-            padding: 8px 20px;
-            font-size: 15px;
-
-            & > i {
-                width: 20px;
-                position: relative;
-                top: 1px;
-            }
-        }
-    }
-}
-
-.dropdown-menu-right {
-    & > li {
-        & > a {
-            text-align: right;
-        }
-    }
-}