Remove outdated components page

doc/development/fe_guide/components.md

-# Components
-
-## Contents
-
-- [Dropdowns](#dropdowns)
-
-## Dropdowns
-
-See also the [corresponding UX guide](https://design.gitlab.com/#/components/dropdowns).
-
-### How to style a bootstrap dropdown
-
-1. Use the HTML structure provided by the [docs][bootstrap-dropdowns]
-1. Add a specific class to the top level `.dropdown` element
-
-   ```Haml
-   .dropdown.my-dropdown
-     %button{ type: 'button', data: { toggle: 'dropdown' }, 'aria-haspopup': true, 'aria-expanded': false }
-       %span.dropdown-toggle-text
-         Toggle Dropdown
-       = icon('chevron-down')
-
-     %ul.dropdown-menu
-       %li
-         %a
-           item!
-   ```
-
-   Or use the helpers
-
-   ```Haml
-   .dropdown.my-dropdown
-     = dropdown_toggle('Toogle!', { toggle: 'dropdown' })
-     = dropdown_content
-       %li
-         %a
-           item!
-   ```
-
-[bootstrap-dropdowns]: https://getbootstrap.com/docs/3.3/javascript/#dropdowns
+---
+redirect_to: 'https://design.gitlab.com/components/status/'
+---