Staging: comedi: adv_pci1710: Remove unneeded chanlist_len check

For AI command testing, the driver does not need to range-check
the length of the channel list as the comedi core has already
checked it.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/adv_pci1710.c

@@ -1035,14 +1035,6 @@ static int pci171x_ai_cmdtest(struct comedi_device *dev,
 		}
 	}
 
-	if (!cmd->chanlist_len) {
-		cmd->chanlist_len = 1;
-		err++;
-	}
-	if (cmd->chanlist_len > this_board->n_aichan) {
-		cmd->chanlist_len = this_board->n_aichan;
-		err++;
-	}
 	if (cmd->scan_end_arg != cmd->chanlist_len) {
 		cmd->scan_end_arg = cmd->chanlist_len;
 		err++;