boards: sc: adopt new zephyr:board directive and role

This updates the documentation of all the Space Cubics boards to use
the new `zephyr:board::` directive.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

boards/sc/scobc_module1/doc/index.rst

@@ -1,7 +1,4 @@
-.. _scobc_module1:
-
-Space Cubics OBC module 1
-#########################
+.. zephyr:board:: scobc_module1
 
 Overview
 ********
@@ -10,12 +7,6 @@ Overview
 especially for 3U CubeSats.  The board is based on Xilinx Artix-7 FPGA and
 implements ARM Cortex M3 as the main CPU.
 
-.. figure:: scobc.jpg
-   :align: center
-   :alt: Space Cubics OBC module 1
-
-   Space Cubics OBC module 1
-
 It is designed to survive in the severe space environment, extreme temperature,
 vacuum, and space radiation.