Revert nmap discovery (#2152)
Revert nmap discovery (#2152)

* Revert "enh(linux/local): add timeout and sudo as options for nmap discovery (#2148)"

This reverts commit 8e9b1ddc4b23a7c006a86b12caf1a35b94e09b83.

Both options are implemented in cli custom mode, timeout defaut will be 120.

* enh(linux/local): add timeout default in help
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