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@@ -4,6 +4,7 @@
 
 ### Enhancements and minor changes
 * Added `NWBHDF5IO.read_nwb` convenience method to simplify reading an NWB file. @h-mayorquin [#1979](https://github.com/NeurodataWithoutBorders/pynwb/pull/1979)
+* Removed unused references to region references and builders in preparation for changes in HDMF 4.0. @rly [#1991](https://github.com/NeurodataWithoutBorders/pynwb/pull/1991)
 
 ### Documentation and tutorial enhancements
 - Added documentation example for `SpikeEventSeries`. @stephprince [#1983](https://github.com/NeurodataWithoutBorders/pynwb/pull/1983)