usb: class: usbtmc: delete unnecessary 'out of memory' messages

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/class/usbtmc.c

@@ -1104,10 +1104,8 @@ static int usbtmc_probe(struct usb_interface *intf,
 	dev_dbg(&intf->dev, "%s called\n", __func__);
 
 	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
-	if (!data) {
-		dev_err(&intf->dev, "Unable to allocate kernel memory\n");
+	if (!data)
 		return -ENOMEM;
-	}
 
 	data->intf = intf;
 	data->id = id;