diff --git a/src/libkdepim/CMakeLists.txt b/src/libkdepim/CMakeLists.txt
index 6a78b05158bb9f6d176de80a1cdfd6531cd3081c..9f5eaff42e8394ff07df226a2da59e384a386700 100644
--- a/src/libkdepim/CMakeLists.txt
+++ b/src/libkdepim/CMakeLists.txt
@@ -28,7 +28,6 @@ set(kdepim_widgets_LIB_SRCS
     )
 
 set(kdepim_misc_LIB_SRCS
-    misc/uistatesaver.cpp
     misc/lineeditcatchreturnkey.cpp
     )
 
@@ -96,7 +95,6 @@ ecm_generate_headers(libkdepim_Camelcasewidgets_HEADERS
 
 ecm_generate_headers(libkdepim_Camelcasemisc_HEADERS
     HEADER_NAMES
-    UiStateSaver
     LineEditCatchReturnKey
     REQUIRED_HEADERS libkdepim_misc_HEADERS
     PREFIX Libkdepim
diff --git a/src/libkdepim/misc/uistatesaver.cpp b/src/libkdepim/misc/uistatesaver.cpp
deleted file mode 100644
index fd76c42181d6b2b43270522306bff8f65e3b6278..0000000000000000000000000000000000000000
--- a/src/libkdepim/misc/uistatesaver.cpp
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
-    SPDX-FileCopyrightText: 2008 Volker Krause <vkrause@kde.org>
-
-    SPDX-License-Identifier: LGPL-2.0-or-later
-*/
-
-#include "uistatesaver.h"
-
-#include <KConfigGroup>
-
-#include <QComboBox>
-#include <QHeaderView>
-#include <QSplitter>
-#include <QTabWidget>
-#include <QTreeView>
-
-using namespace KPIM;
-
-struct Saver {
-    static void process(QSplitter *splitter, KConfigGroup &config)
-    {
-        if (splitter->sizes().count(0) == splitter->sizes().count()) {
-            return;
-        }
-        config.writeEntry(splitter->objectName(), splitter->sizes());
-    }
-
-    static void process(QTabWidget *tab, KConfigGroup &config)
-    {
-        config.writeEntry(tab->objectName(), tab->currentIndex());
-    }
-
-    static void process(QTreeView *tv, KConfigGroup &config)
-    {
-        config.writeEntry(tv->objectName(), tv->header()->saveState());
-    }
-
-    static void process(QComboBox *cb, KConfigGroup &config)
-    {
-        config.writeEntry(cb->objectName(), cb->currentIndex());
-    }
-};
-
-struct Restorer {
-    static void process(QSplitter *splitter, const KConfigGroup &config)
-    {
-        const QList<int> sizes = config.readEntry(splitter->objectName(), QList<int>());
-        if (!sizes.isEmpty() && splitter->count() == sizes.count() && sizes.count() != sizes.count(0)) {
-            splitter->setSizes(sizes);
-        }
-    }
-
-    static void process(QTabWidget *tab, const KConfigGroup &config)
-    {
-        const int index = config.readEntry(tab->objectName(), -1);
-        if (index >= 0 && index < tab->count()) {
-            tab->setCurrentIndex(index);
-        }
-    }
-
-    static void process(QTreeView *tv, const KConfigGroup &config)
-    {
-        const QByteArray state = config.readEntry(tv->objectName(), QByteArray());
-        if (!state.isEmpty()) {
-            tv->header()->restoreState(state);
-        }
-    }
-
-    static void process(QComboBox *cb, const KConfigGroup &config)
-    {
-        const int index = config.readEntry(cb->objectName(), -1);
-        if (index >= 0 && index < cb->count()) {
-            cb->setCurrentIndex(index);
-        }
-    }
-};
-
-#define PROCESS_TYPE(T) \
-    { \
-        T *obj = qobject_cast<T *>(w); \
-        if (obj) { \
-            Op::process(obj, config); \
-            continue; \
-        } \
-    }
-
-template<typename Op, typename Config> static void processWidgets(QWidget *widget, Config config)
-{
-    QList<QWidget *> widgets = widget->findChildren<QWidget *>();
-    widgets << widget;
-    for (QWidget *w : qAsConst(widgets)) {
-        if (w->objectName().isEmpty()) {
-            continue;
-        }
-        PROCESS_TYPE(QSplitter);
-        PROCESS_TYPE(QTabWidget);
-        PROCESS_TYPE(QTreeView);
-        PROCESS_TYPE(QComboBox);
-    }
-}
-
-#undef PROCESS_TYPE
-
-void UiStateSaver::saveState(QWidget *widget, KConfigGroup &config)
-{
-    processWidgets<Saver, KConfigGroup &>(widget, config);
-}
-
-void UiStateSaver::restoreState(QWidget *widget, const KConfigGroup &config)
-{
-    processWidgets<Restorer, const KConfigGroup &>(widget, config);
-}
diff --git a/src/libkdepim/misc/uistatesaver.h b/src/libkdepim/misc/uistatesaver.h
deleted file mode 100644
index 9f3ee5ae52f9e24b5f27faca5674ad325f5d78b0..0000000000000000000000000000000000000000
--- a/src/libkdepim/misc/uistatesaver.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
-    SPDX-FileCopyrightText: 2008 Volker Krause <vkrause@kde.org>
-
-    SPDX-License-Identifier: LGPL-2.0-or-later
-*/
-
-#ifndef UISTATESAVER_H
-#define UISTATESAVER_H
-
-#include "kdepim_export.h"
-
-class QWidget;
-class KConfigGroup;
-
-namespace KPIM {
-/**
- * @short Methods to save and restore the UI state of an application.
- *
- * This namespace provides methods that automatically save and restore
- * the state of various UI elements to/from a configuration group.
- *
- * The following widgets are supported so far:
- * - QSplitter
- * - QTabWidget
- * - QTreeView
- * - QComboBox
- *
- * @note The widgets need to have set an objectName, otherwise they are ignored
- *       on processing.
- *
- * @author Volker Krause <vkrause@kde.org>
- * @since 4.5
- */
-namespace UiStateSaver {
-/**
-   * Saves the state of @p widget and all its sub-widgets to @p config.
-   * @param widget The top-level widget which state should be saved.
-   * @param config The config group the settings should be written to.
-   */
-KDEPIM_EXPORT void saveState(QWidget *widget, KConfigGroup &config);
-
-/**
-   * Restores the UI state of @p widget and all its sub-widgets from @p config.
-   * @param widget The top-level widget which state should be restored.
-   * @param config The config gorup the settings should be read from.
-   */
-KDEPIM_EXPORT void restoreState(QWidget *widget, const KConfigGroup &config);
-}
-}
-
-#endif