cfg: remove duplicate Olimex ARM-USB-OCD config

This file is already included as olimex-arm-usb-ocd.cfg.

Change-Id: I0e66977c58e74ac93a0dc3a0c88a5e5af4992f8b
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/780


Tested-by: jenkins
Reviewed-by: Peter Stuge <peter@stuge.se>