How to delete a sub-interface of an AR router

You can delete a sub-interface of an AR router as follows:
You can run the undo interface sub-interface number command to delete a created sub-interface.
system-view
[Huawei] undo interface gigabitethernet 1/0/0.1 //Delete sub-interface G1/0/0.1

Other related questions:
How to configure a sub-interface on an AR router
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