arm64: dts: qcom: ipq9574-rdp433: remove unused 'sdc-default-state'

Since commit 8140d105 ("arm64: dts: qcom: ipq9574: Remove eMMC node"),
the 'sdc-default-state' pinctrl state is not used so remove that.

Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250701-rdp433-remove-sdc-state-v1-1-ca0f156a42d5@gmail.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>