arm64: dts: qcom: x1e80100-hp-omnibook-x14: Remove invalid bt-en-sleep node

arm64: dts: qcom: x1e80100-hp-omnibook-x14: Remove invalid bt-en-sleep node

Remove the invalid bt-en-sleep node. Not sure how it came into existence
but it seems the functionality is covered by the wcn-wlan-bt-en-state node:

	wcn_wlan_bt_en: wcn-wlan-bt-en-state {
		pins = "gpio116", "gpio117";
		function = "gpio";
		drive-strength = <2>;
		bias-disable;
	};

This fixes the following warning:

arch/arm64/boot/dts/qcom/x1e80100-hp-omnibook-x14.dtb: pinctrl@f100000: Unevaluated properties are not allowed ('bt-en-sleep' was unexpected)
        from schema $id: http://devicetree.org/schemas/pinctrl/qcom,x1e80100-tlmm.yaml#

Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250416-fix-omnibook-dts-v1-1-2409220a7c6f@canonical.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>