LoongArch: Remove clockevents shutdown call on offlining
The clockevents core already detached and unregistered it at this stage.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250906064952.3749122-3-maobibo@loongson.cn
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