chore: rm some unused types (#9667)

crates/engine/tree/src/backfill.rs

@@ -168,7 +168,7 @@ where
         }
 
         // make sure we poll the pipeline if it's active, and return any ready pipeline events
-        if !self.is_pipeline_idle() {
+        if self.is_pipeline_active() {
             // advance the pipeline
             if let Poll::Ready(event) = self.poll_pipeline(cx) {
                 return Poll::Ready(event)

crates/engine/tree/src/chain.rs

@@ -147,14 +147,6 @@ where
     }
 }
 
-/// Represents the sync mode the chain is operating in.
-#[derive(Debug, Default)]
-enum SyncMode {
-    #[default]
-    Handler,
-    Backfill,
-}
-
 /// Event emitted by the [`ChainOrchestrator`]
 ///
 /// These are meant to be used for observability and debugging purposes.
@@ -201,25 +193,3 @@ pub enum FromOrchestrator {
     /// Invoked when backfill sync started
     BackfillSyncStarted,
 }
-
-/// Represents the state of the chain.
-#[derive(Clone, Copy, PartialEq, Eq, Default, Debug)]
-pub enum OrchestratorState {
-    /// Orchestrator has exclusive write access to the database.
-    BackfillSyncActive,
-    /// Node is actively processing the chain.
-    #[default]
-    Idle,
-}
-
-impl OrchestratorState {
-    /// Returns `true` if the state is [`OrchestratorState::BackfillSyncActive`].
-    pub const fn is_backfill_sync_active(&self) -> bool {
-        matches!(self, Self::BackfillSyncActive)
-    }
-
-    /// Returns `true` if the state is [`OrchestratorState::Idle`].
-    pub const fn is_idle(&self) -> bool {
-        matches!(self, Self::Idle)
-    }
-}