diff --git a/include/openthread/dataset.h b/include/openthread/dataset.h
index 8598c3a43..ea804b9c2 100644
--- a/include/openthread/dataset.h
+++ b/include/openthread/dataset.h
@@ -406,31 +406,6 @@ OTAPI otError OTCALL otDatasetSendMgmtPendingSet(otInstance *                aIn
                                                  const uint8_t *             aTlvs,
                                                  uint8_t                     aLength);
 
-/**
- * Get minimal delay timer.
- *
- * @param[in]  aInstance A pointer to an OpenThread instance.
- *
- * @retval the value of minimal delay timer (in ms).
- *
- */
-OTAPI uint32_t OTCALL otDatasetGetDelayTimerMinimal(otInstance *aInstance);
-
-/**
- * Set minimal delay timer.
- *
- * @note This API is reserved for testing and demo purposes only. Changing settings with
- * this API will render a production application non-compliant with the Thread Specification.
- *
- * @param[in]  aInstance           A pointer to an OpenThread instance.
- * @param[in]  aDelayTimerMinimal  The value of minimal delay timer (in ms).
- *
- * @retval  OT_ERROR_NONE          Successfully set minimal delay timer.
- * @retval  OT_ERROR_INVALID_ARGS  If @p aDelayTimerMinimal is not valid.
- *
- */
-OTAPI otError OTCALL otDatasetSetDelayTimerMinimal(otInstance *aInstance, uint32_t aDelayTimerMinimal);
-
 /**
  * @}
  *