Update src/iceberg/type_fwd.h

Co-authored-by: Gang Wu <[email protected]>

Author: HeartLinked

src/iceberg/type_fwd.h

@@ -133,7 +133,6 @@ class ManifestListWriter;
 class Reader;
 class Writer;
 
-class Avro;
 
 class ScanTask;
 class DataTableScan;