diff --git a/src/H5ChunkedWriter.hpp b/src/H5ChunkedWriter.hpp
index f5c9d04..9921fe8 100644
--- a/src/H5ChunkedWriter.hpp
+++ b/src/H5ChunkedWriter.hpp
@@ -5,10 +5,6 @@
 #include "config.hpp"
 #include "h5_utils.hpp"
 
-hsize_t expand_dataset(const H5::DataSet& dataset, hsize_t frame_index, hsize_t dataset_increase_step);
-
-void compact_dataset(const H5::DataSet& dataset, hsize_t max_frame_index);
-
 class HDF5ChunkedWriter
 {
     // Initialized in constructor.