Remove unneeded classes

Signed-off-by: Mohit Godwani <mgodwan@amazon.com>

Author: mgodwan

server/src/main/java/org/opensearch/index/engine/exec/CatalogSnapshot.java

@@ -16,7 +16,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.function.Supplier;
 
 /**
  * Abstract base class representing a snapshot of the catalog state at a specific point in time.
@@ -108,13 +107,6 @@ public long getVersion() {
      */
     public abstract String serializeToString() throws IOException;
 
-    /**
-     * Sets the supplier for IndexFileDeleter.
-     *
-     * @param supplier the IndexFileDeleter supplier
-     */
-    public abstract void setIndexFileDeleterSupplier(Supplier<IndexFileReferenceManager> supplier);
-
     /**
      * Sets the catalog snapshot map for tracking multiple snapshots.
      *