comedi: remove redundant assignment to variable buffer_config

Variable buffer_config is being assigned a value that is never read, it
is being re-assigned later on. The assignment is redundant and can be
removed.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220130232910.9313-1-colin.i.king@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/comedi/drivers/pcm3724.c

@@ -93,7 +93,6 @@ static void do_3724_config(struct comedi_device *dev,
 	unsigned long port_8255_cfg;
 
 	config = I8255_CTRL_CW;
-	buffer_config = 0;
 
 	/* 1 in io_bits indicates output, 1 in config indicates input */
 	if (!(s->io_bits & 0x0000ff))