[QUESTION] Clear a local variable in hush shell

Hi,

what is the correct way to clear a local variable in the hush shell? The "c=" doesn't work because the commit "common: cli_hush: avoid dead code" (aa722529635c16c52d9d609122fecc96ec8d03e4) explicitly change the function set_local_var to return -1 if a value is missing.

Regards Stefan

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