more new clippy fixes

reflector/src/main.rs

···
     Data(parent): Data<&Option<String>>,
     Query(AskQuery { domain }): Query<AskQuery>,
 ) -> Response {
-    if let Some(parent) = parent {
-        if let Some(prefix) = domain.strip_suffix(&format!(".{parent}")) {
-            if !prefix.contains('.') {
-                // no sub-sub-domains allowed
-                return Response::builder().body("ok");
-            }
-        }
+    if let Some(parent) = parent
+        && let Some(prefix) = domain.strip_suffix(&format!(".{parent}"))
+        && !prefix.contains('.')
+    {
+        // no sub-sub-domains allowed
+        return Response::builder().body("ok");
     };
     Response::builder()
         .status(StatusCode::FORBIDDEN)

spacedust/src/subscriber.rs

···
         loop {
             tokio::select! {
                 l = receiver.recv() => match l {
-                    Ok(link) => if self.filter(&link.properties) {
-                        if let Err(e) = ws_sender.send(link.message.clone()).await {
-                            log::warn!("failed to send link, dropping subscriber: {e:?}");
-                            break;
-                        }
+                    Ok(link) => if self.filter(&link.properties)
+                        && let Err(e) = ws_sender.send(link.message.clone()).await
+                    {
+                        log::warn!("failed to send link, dropping subscriber: {e:?}");
+                        break;
                     },
                     Err(RecvError::Closed) => self.shutdown.cancel(),
                     Err(RecvError::Lagged(n)) => {

who-am-i/src/server.rs

···
             Some(parent_host),
         );
     }
-    if let Some(ref app) = params.app {
-        if !allowed_hosts.contains(app) {
-            return err("Login is not allowed for this app", false, Some(app));
-        }
+    if let Some(ref app) = params.app
+        && !allowed_hosts.contains(app)
+    {
+        return err("Login is not allowed for this app", false, Some(app));
     }
     let parent_origin = url.origin().ascii_serialization();
     if parent_origin == "null" {