staging: kpc_i2c: Remove unused file

The whole file was wrapped in an #if 0.  I'm guessing it was a leftover file
from when we were first developing the driver and we just forgot about it.

Signed-off-by: Matt Sickler <matt.sickler@daktronics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>