Remove superfluous `use` statements.

client/src/main.rs

@@ -2,8 +2,6 @@ use std::path::Path;
 
 use anyhow::Context;
 use clap::{App, Arg};
-use crossbeam_channel;
-use env_logger;
 use log::{error, info};
 use solstice_proto::server::{Client, ServerRequest};
 use tokio::net::TcpStream;