fix(cachet): remove manual eprintln session printing in dynamic bench

Author: Copilot

crates/cachet/benches/dynamic.rs

@@ -120,10 +120,6 @@ fn bench_dynamic_cache(c: &mut Criterion) {
     });
 
     group.finish();
-    // Use eprintln (not println) so output goes to stderr. Writing to stdout
-    // breaks nextest's benchmark list parser, which expects every non-empty
-    // stdout line to end with ': test' or ': benchmark'.
-    eprintln!("\n{session}");
 }
 
 criterion_group!(benches, bench_dynamic_cache);