StateResolution's methods take &self now + more clean up

Cargo.toml

@@ -15,7 +15,6 @@ repository = "https://github.com/ruma/state-res"
 [dependencies]
 itertools = "0.9.0"
 js_int = "0.1.8"
-petgraph = "0.5.1"
 serde = { version = "1.0.114", features = ["derive"] }
 serde_json = "1.0.56"
 tracing = "0.1.16"
@@ -29,7 +28,6 @@ branch = "pdu-deserialize"
 features = ["client-api", "federation-api", "appservice-api"]
 
 [dev-dependencies]
-lazy_static = "1.4.0"
 criterion = "0.3.3"
 
 [[bench]]

src/lib.rs

@@ -352,6 +352,12 @@ impl StateResolution {
                 (-*pl, *ev.origin_server_ts(), ev.event_id().cloned())
             );
 
+            // count_0.sort_by(|(x, _), (y, _)| {
+            //     x.power_level
+            //         .cmp(&a.power_level)
+            //         .then_with(|| x.origin_server.ts.cmp(&y.origin_server_ts))
+            //         .then_with(|| x.event_id.cmp(&y.event_id))
+
             // This return value is the key used for sorting events,
             // events are then sorted by power level, time,
             // and lexically by event_id.