Clean up unused flags (#30528)

GitOrigin-RevId: cf2060d70981a21923376158c0ff65aa3d594b27

crates/common/src/knobs.rs

@@ -368,10 +368,6 @@ pub static DOCUMENT_RETENTION_DELAY: LazyLock<Duration> = LazyLock::new(|| {
     Duration::from_secs(env_config("DOCUMENT_RETENTION_DELAY", 60 * 60 * 24 * 90))
 });
 
-/// Resets DocumentRetentionConfirmedDeletedTimestamp to Timestamp::MIN
-pub static RESET_DOCUMENT_RETENTION: LazyLock<bool> =
-    LazyLock::new(|| env_config("RESET_DOCUMENT_RETENTION", false));
-
 /// The time backend should wait before it acquires the lease. This wait allows
 /// for the backend to be added to service discovery, before it renders the
 /// previous backends unusable.

crates/database/src/retention.rs

@@ -48,7 +48,6 @@ use common::{
         INDEX_RETENTION_DELETE_CHUNK,
         INDEX_RETENTION_DELETE_PARALLEL,
         MAX_RETENTION_DELAY_SECONDS,
-        RESET_DOCUMENT_RETENTION,
         RETENTION_DELETES_ENABLED,
         RETENTION_DELETE_BATCH,
         RETENTION_DOCUMENT_DELETES_ENABLED,
@@ -238,15 +237,6 @@ impl<RT: Runtime> LeaderRetentionManager<RT> {
         snapshot_reader: Reader<SnapshotManager<RT>>,
         follower_retention_manager: FollowerRetentionManager<RT>,
     ) -> anyhow::Result<LeaderRetentionManager<RT>> {
-        if *RESET_DOCUMENT_RETENTION {
-            persistence
-                .write_persistence_global(
-                    PersistenceGlobalKey::DocumentRetentionConfirmedDeletedTimestamp,
-                    ConvexValue::from(i64::from(Timestamp::MIN)).into(),
-                )
-                .await?;
-        }
-
         let reader = persistence.reader();
         let snapshot_ts = snapshot_reader.lock().latest_ts();
         let min_snapshot_ts = snapshot_ts.prior_ts(