Hi Hobbit,
On a standalone device that has not set up a stack, you can directly delete the stack port configuration, which does not affect services on the live network.
For specific operations, you can refer to the procedure and procedure for splitting a Stack. See https://support.huawei.com/hedex/hdx.do?docid=EDOC1100064949&id=dc_cfg_istack_1053&text=null&lang=en