dt-bindings: usb: richtek,rt1711h: remove deprecated .txt file

dt-bindings: usb: richtek,rt1711h: remove deprecated .txt file

Remove the deprecated .txt binding for richtek,rt1711h. It was
superseded by the YAML schema added in commit a72095ed8e65
("dt-bindings usb: typec: rt1711h: Add binding for Richtek RT1711H").

Signed-off-by: Akash Sukhavasi <akash.sukhavasi@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260520170451.2403-1-akash.sukhavasi@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>