zephyr: doc: fix board page

boards/index.rst

@@ -12,33 +12,8 @@ template available under :zephyr_file:`doc/templates/board.tmpl`.
 Shields are hardware add-ons that can be stacked on top of a board to add extra functionality.
 Refer to the :ref:`shield_porting_guide` for more information on how to port a shield.
 
-.. admonition:: Search Tips
-   :class: dropdown
-
-   * Use the form below to filter the list of supported boards and shields. If a field is left
-     empty, it will not be used in the filtering process.
-
-   * Filtering by name and vendor is available for both boards and shields. The rest of the fields
-     apply only to boards.
-
-   * A board/shield must meet **all** criteria selected across different fields. For example, if you
-     select both a vendor and an architecture, only boards that match both will be displayed. Within
-     a single field, selecting multiple options (such as two architectures) will show boards
-     matching **either** option.
-
-   * The list of supported hardware features for each board is automatically generated using
-     information from the Devicetree. It may not be reflecting the full list of supported features
-     since some of them may not be enabled by default.
-
-   * Can't find your exact board? Don't worry! If a similar board with the same or a closely related
-     MCU exists, you can use it as a :ref:`starting point <create-your-board-directory>` for adding
-     support for your own board.
-
 .. toctree::
    :maxdepth: 2
    :glob:
-   :hidden:
 
    */index
-
-.. zephyr:board-catalog::