doc: remove spurious console code block from arduino_zero doc.
doc: remove spurious console code block from arduino_zero doc.

Remove spurious console code block to fix formatting of the following
zephyr-app-commands directive. While I am here, fix the indentation of
the two zephyr-app-commands directives.

Signed-off-by: Henrik Brix Andersen <a076b11c2cc63ccdc903dbe182e1eecc3cbbc094@brixandersen.dk>

zephyriot/zephyr,zephyriot/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,punitvara/zephyr,finikorg/zephyr,Vudentz/zephyr,mbolivar/zephyr,explora26/zephyr,finikorg/zephyr,galak/zephyr,explora26/zephyr,nashif/zephyr,punitvara/zephyr,Vudentz/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,ldts/zephyr,mbolivar/zephyr,kraj/zephyr,nashif/zephyr,ldts/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,Vudentz/zephyr,Vudentz/zephyr,ldts/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,Vudentz/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,finikorg/zephyr,Vudentz/zephyr,galak/zephyr,ldts/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,finikorg/zephyr,explora26/zephyr,zephyriot/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,explora26/zephyr,kraj/zephyr,nashif/zephyr,kraj/zephyr,explora26/zephyr,nashif/zephyr