Staging: comedi: non working tests on unsigned cmd->convert_arg

Remove tests for negative unsigned.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/s626.c

@@ -1886,31 +1886,16 @@ static int s626_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s
 		err++;
 	}
 
-	if (cmd->start_src == TRIG_EXT && cmd->start_arg < 0) {
-		cmd->start_arg = 0;
-		err++;
-	}
-
 	if (cmd->start_src == TRIG_EXT && cmd->start_arg > 39) {
 		cmd->start_arg = 39;
 		err++;
 	}
 
-	if (cmd->scan_begin_src == TRIG_EXT && cmd->scan_begin_arg < 0) {
-		cmd->scan_begin_arg = 0;
-		err++;
-	}
-
 	if (cmd->scan_begin_src == TRIG_EXT && cmd->scan_begin_arg > 39) {
 		cmd->scan_begin_arg = 39;
 		err++;
 	}
 
-	if (cmd->convert_src == TRIG_EXT && cmd->convert_arg < 0) {
-		cmd->convert_arg = 0;
-		err++;
-	}
-
 	if (cmd->convert_src == TRIG_EXT && cmd->convert_arg > 39) {
 		cmd->convert_arg = 39;
 		err++;