Keep feature tests focused on behavior (#33864)

## What changed

Remove tests that only restate feature registry metadata or constant values. Keep coverage for behavioral contracts such as feature aliases, dependency normalization, deprecated settings, and ignored removed settings.

GitOrigin-RevId: 45e2919dc3d854da3192ad7057a0f1c5c60271b9

codex-rs/exec/src/lib_tests.rs

@@ -23,11 +23,6 @@ fn test_tracing_subscriber() -> impl tracing::Subscriber + Send + Sync {
     tracing_subscriber::registry().with(tracing_opentelemetry::layer().with_tracer(tracer))
 }
 
-#[test]
-fn exec_defaults_analytics_to_enabled() {
-    assert_eq!(DEFAULT_ANALYTICS_ENABLED, true);
-}
-
 #[derive(Clone)]
 struct TestLogWriter {
     buffer: Arc<Mutex<Vec<u8>>>,