ARM: dts: imx7-colibri: remove spurious debounce property

Remove spurious debounce property from linux,extcon-usb-gpio.

Note that debouncing is hard-coded to 20 ms (USB_GPIO_DEBOUNCE_MS
define).
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7-colibri.dtsi

@@ -29,7 +29,6 @@ chosen {
 
 	extcon_usbc_det: usbc-det {
 		compatible = "linux,extcon-usb-gpio";
-		debounce = <25>;
 		id-gpio = <&gpio7 14 GPIO_ACTIVE_HIGH>; /* SODIMM 137 / USBC_DET */
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_usbc_det>;