Function esp_console_cmd_deregister 

pub unsafe extern "C" fn esp_console_cmd_deregister(
    cmd_name: *const u8,
) -> i32

@brief Deregister console command @param cmd_name Name of the command to be deregistered. Must not be NULL, must not contain spaces.

@return - ESP_OK on success - ESP_ERR_INVALID_ARG if command is not registered