Un-Arc<> TorClient in the arti crate

TorClient doesn't need to be wrapped in an Arc any longer, thanks
to other refactoring.

crates/arti/src/main.rs

@@ -92,8 +92,6 @@ mod process;
 mod proxy;
 mod trace;
 
-use std::sync::Arc;
-
 use arti_client::{TorClient, TorClientConfig};
 use arti_config::{default_config_file, ArtiConfig};
 use tor_rtcompat::{BlockOn, Runtime};
@@ -112,11 +110,10 @@ async fn run<R: Runtime>(
     futures::select!(
         r = exit::wait_for_ctrl_c().fuse() => r,
         r = async {
-            let client =
-                Arc::new(TorClient::bootstrap(
+            let client = TorClient::bootstrap(
                     runtime.clone(),
                     client_config,
-                ).await?);
+                ).await?;
             proxy::run_socks_proxy(runtime, client, socks_port).await
         }.fuse() => r,
     )

crates/arti/src/proxy.rs

@@ -106,7 +106,7 @@ impl IsolationMap {
 /// id and the source address for the socks request.
 async fn handle_socks_conn<R, S>(
     runtime: R,
-    tor_client: Arc<TorClient<R>>,
+    tor_client: TorClient<R>,
     socks_stream: S,
     isolation_map: Arc<IsolationMap>,
     isolation_info: (usize, IpAddr),
@@ -388,7 +388,7 @@ fn accept_err_is_fatal(err: &IoError) -> bool {
 /// network.
 pub(crate) async fn run_socks_proxy<R: Runtime>(
     runtime: R,
-    tor_client: Arc<TorClient<R>>,
+    tor_client: TorClient<R>,
     socks_port: u16,
 ) -> Result<()> {
     let mut listeners = Vec::new();
@@ -443,7 +443,7 @@ pub(crate) async fn run_socks_proxy<R: Runtime>(
                 }
             }
         };
-        let client_ref = Arc::clone(&tor_client);
+        let client_ref = tor_client.clone();
         let runtime_copy = runtime.clone();
         let isolation_map_ref = Arc::clone(&isolation_map);
         runtime.spawn(async move {