staging: comedi: cb_pcidas64: remove unnecessary include

The hardware supported by this driver does not have an 8254 timer. Remove the
unnecessary include of "8253.h".
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/cb_pcidas64.c

@@ -87,7 +87,6 @@
 
 #include "../comedidev.h"
 
-#include "8253.h"
 #include "8255.h"
 #include "plx9080.h"
 #include "comedi_fc.h"