cmd: demo: Remove duplicated help message for list subcommand
There is no need to show demo list description twice when help demo is
performed. The patch removes duplicated entry.
Current state:
=> help demo
demo - Driver model (dm) demo operations
Usage:
demo list List available demo devices
demo hello <num> [<char>] Say hello
demo light [<num>] Set or get the lights
demo status <num> Get demo device status
demo list List available demo devices
Fixes:
a02af4aeece4 ("dm: demo: Add a simple GPIO demonstration")
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>