README: Comment out STM32 section.
README: Comment out STM32 section.

Change-Id: Ic959a59c81ae9d4e0c6d99efaf81fc9ef17e33e6
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython