deps: replace tracing with log+env_logger, drop console-subscriber

Switch all tracing::{info,warn,error} to log::{info,warn,error}.
Replace tracing_subscriber::fmt::init() with env_logger::init().
Drop tracing, tracing-subscriber, tracing-appender as direct deps.
Drop console feature from jobkit (was pulling in console-subscriber
which pulled in tracing-subscriber).

tracing still compiled as transitive dep of reqwest and tui-markdown,
but our code no longer depends on it.

Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>

channels/irc/src/main.rs

@@ -24,7 +24,7 @@ use futures::AsyncReadExt;
 use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
 use tokio::net::UnixListener;
 use tokio_util::compat::TokioAsyncReadCompatExt;
-use tracing::{error, info, warn};
+use log::{info, warn, error};
 
 use poc_memory::channel_capnp::{channel_client, channel_server};
 
@@ -609,7 +609,7 @@ fn channel_to_target(channel: &str) -> String {
 
 #[tokio::main(flavor = "current_thread")]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
-    tracing_subscriber::fmt::init();
+    env_logger::init();
 
     let config = load_config();
     let state = Rc::new(RefCell::new(State::new(config)));