diff -r fd21d1840dff -r b8c49e7a1dba src/ucx/list.h
--- a/src/ucx/list.h	Wed May 16 19:33:31 2018 +0200
+++ b/src/ucx/list.h	Thu May 17 11:13:02 2018 +0200
@@ -212,96 +212,6 @@
  */
 UcxList *ucx_list_append_a(UcxAllocator *allocator, UcxList *list, void *data);
 
-/**
- * Inserts an element at the end of the list, if it is not present in the list.
- * 
- * <b>Note:</b> You should not try to store a freshly allocated object. Since
- * it might be a duplicate, the memory allocated for that copy would be leaking
- * afterwards.
- * 
- * <b>Deprecation notice:</b> This function is considered to do more harm than
- * it adds usefulness and is going to be removed in a future UCX release.
- * 
- * @param list the list where to append the data, or <code>NULL</code> to
- * create a new list
- * @param data the data to insert
- * @param cmpfnc the compare function
- * @param cmpdata additional data for the compare function
- * @return <code>list</code>, if it is not <code>NULL</code> or a pointer to
- * the newly created list otherwise
- * @see ucx_list_append()
- */
-UcxList *ucx_list_append_once(UcxList *list, void *data,
-        cmp_func cmpfnc, void *cmpdata);
-
-/**
- * Inserts an element at the end of the list, if it is not present in the list,
- * using a UcxAllocator.
- * 
- * <b>Note:</b> You should not try to store a freshly allocated object. Since
- * it might be a duplicate, the memory allocated for that copy would be leaking
- * afterwards.
- * 
- * <b>Deprecation notice:</b> This function is considered to do more harm than
- * it adds usefulness and is going to be removed in a future UCX release.
- * 
- * @param allocator the allocator to use
- * @param list the list where to append the data, or <code>NULL</code> to
- * create a new list
- * @param data the data to insert
- * @param cmpfnc the compare function
- * @param cmpdata additional data for the compare function
- * @return <code>list</code>, if it is not <code>NULL</code> or a pointer to
- * the newly created list otherwise
- * @see ucx_list_append_a()
- */
-UcxList *ucx_list_append_once_a(UcxAllocator *allocator,
-        UcxList *list, void *data, cmp_func cmpfnc, void *cmpdata);
-
-/**
- * Inserts an element at the beginning of the list, if it is not present
- * in the list.
- * 
- * <b>Note:</b> You should not try to store a freshly allocated object. Since
- * it might be a duplicate, the memory allocated for that copy would be leaking
- * afterwards.
- * 
- * <b>Deprecation notice:</b> This function is considered to do more harm than
- * it adds usefulness and is going to be removed in a future UCX release.
- * 
- * @param list the list where to prepend the data, or <code>NULL</code> to
- * create a new list
- * @param data the data to insert
- * @param cmpfnc the compare function
- * @param cmpdata additional data for the compare function
- * @return a pointer to the new list head
- * @see ucx_list_prepend()
- */
-UcxList *ucx_list_prepend_once(UcxList *list, void *data,
-        cmp_func cmpfnc, void *cmpdata);
-
-/**
- * Inserts an element at the beginning of the list, if it is not present in
- * the list, using a UcxAllocator.
- * 
- * <b>Note:</b> You should not try to store a freshly allocated object. Since
- * it might be a duplicate, the memory allocated for that copy would be leaking
- * afterwards.
- * 
- * <b>Deprecation notice:</b> This function is considered to do more harm than
- * it adds usefulness and is going to be removed in a future UCX release.
- * 
- * @param allocator the allocator to use
- * @param list the list where to prepend the data, or <code>NULL</code> to
- * create a new list
- * @param data the data to insert
- * @param cmpfnc the compare function
- * @param cmpdata additional data for the compare function
- * @return a pointer to the new list head
- * @see ucx_list_prepend_a()
- */
-UcxList *ucx_list_prepend_once_a(UcxAllocator *allocator,
-        UcxList *list, void *data, cmp_func cmpfnc, void *cmpdata);
 
 /**
  * Inserts an element at the beginning of the list.