fix unit test failures

node/sync/src/controllers/serial.rs

@@ -89,9 +89,6 @@ pub struct SerialSyncController {
 
     /// Cache for storing and serving gossip messages.
     file_location_cache: Arc<FileLocationCache>,
-
-    /// Whether to find files from neighbors only.
-    neighbors_only: bool,
 }
 
 impl SerialSyncController {
@@ -118,7 +115,6 @@ impl SerialSyncController {
             ctx,
             store,
             file_location_cache,
-            neighbors_only: true,
         }
     }