Doc/mb/opencellular/rotundu: Drop documentation

This board is no longer in the tree.

Change-Id: Ie4a626ce85fe0dc2b2d826dd8830a8e80ec331aa
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66088
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Crawford <tcrawford@system76.com>
Reviewed-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>

Documentation/mainboard/index.md

@@ -146,7 +146,6 @@ The boards in this section are not real mainboards, but emulators.
 ## Open Cellular
 
 - [Elgon](opencellular/elgon.md)
-- [Rotundu](opencellular/rotundu.md)
 
 ## PC Engines
 

Documentation/mainboard/opencellular/rotundu.md

@@ -1,76 +0,0 @@
-# Rutundu
-
-This page describes how to run coreboot on the [Rotundu] compute board
-from [OpenCellular].
-
-## TODO
-
-* Configure UART
-* EC interface
-
-## Flashing coreboot
-
-```eval_rst
-+---------------------+------------+
-| Type                | Value      |
-+=====================+============+
-| Socketed flash      | no         |
-+---------------------+------------+
-| Model               | W25Q128    |
-+---------------------+------------+
-| Size                | 16 MiB     |
-+---------------------+------------+
-| In circuit flashing | yes        |
-+---------------------+------------+
-| Package             | SOIC-8     |
-+---------------------+------------+
-| Write protection    | No         |
-+---------------------+------------+
-| Dual BIOS feature   | No         |
-+---------------------+------------+
-| Internal flashing   | yes        |
-+---------------------+------------+
-```
-
-### Internal programming
-
-The SPI flash can be accessed using [flashrom].
-
-### External programming
-
-The GBCv1 board does have a pinheader to flash the SOIC-8 in circuit.
-Directly connecting a Pomona test-clip on the flash is also possible.
-
-**Closeup view of SOIC-8 flash IC**
-
-![][rotundu_flash]
-
-[rotundu_flash]: rotundu_flash.jpg
-
-**SPI header**
-
-![][rotundu_header2]
-
-[rotundu_header2]: rotundu_header2.jpg
-
-**SPI header pinout**
-
-Dediprog compatible pinout.
-
-![][rotundu_j16]
-
-[rotundu_j16]: rotundu_j16.png
-
-## Technology
-
-```eval_rst
-+------------------+--------------------------------------------------+
-| SoC              | Intel Baytrail                                   |
-+------------------+--------------------------------------------------+
-| Coprocessor      | Intel ME                                         |
-+------------------+--------------------------------------------------+
-```
-
-[Rotundu]: https://github.com/Telecominfraproject/OpenCellular
-[OpenCellular]: https://code.fb.com/connectivity/introducing-opencellular-an-open-source-wireless-access-platform/
-[flashrom]: https://flashrom.org/Flashrom