Input: cpcap-pwrbutton - do not set input parent explicitly

We are using devm_input_allocate_device() that already sets parent
of the input device, there is no need to do that again.
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/YWpiZqrfC9+GQsM4@google.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/cpcap-pwrbutton.c

@@ -77,7 +77,6 @@ static int cpcap_power_button_probe(struct platform_device *pdev)
 
 	button->idev->name = "cpcap-pwrbutton";
 	button->idev->phys = "cpcap-pwrbutton/input0";
-	button->idev->dev.parent = button->dev;
 	input_set_capability(button->idev, EV_KEY, KEY_POWER);
 
 	err = devm_request_threaded_irq(&pdev->dev, irq, NULL,