Fixed compiler warnings

src/main.rs

@@ -1,11 +1,9 @@
-use crate::provider::presence;
 use crate::provider::ServiceProvider;
 use clap::{App, Arg, ArgMatches, SubCommand};
 use nym_client::identity::mixnet::KeyPair;
 use std::net::ToSocketAddrs;
 use std::path::PathBuf;
 use std::process;
-use std::thread;
 
 pub mod provider;