diff --git a/src/plugins/diffeditor/diffeditor.cpp b/src/plugins/diffeditor/diffeditor.cpp
index 72e42c5a703..b320bd663e7 100644
--- a/src/plugins/diffeditor/diffeditor.cpp
+++ b/src/plugins/diffeditor/diffeditor.cpp
@@ -290,21 +290,6 @@ QWidget *DiffEditor::toolBar()
     return m_toolBar;
 }
 
-TextEditorWidget *DiffEditor::descriptionWidget() const
-{
-    return m_descriptionWidget;
-}
-
-TextEditorWidget *DiffEditor::unifiedEditorWidget() const
-{
-    return m_unifiedView->textEditorWidget();
-}
-
-TextEditorWidget *DiffEditor::sideEditorWidget(DiffSide side) const
-{
-    return m_sideBySideView->sideEditorWidget(side);
-}
-
 void DiffEditor::documentHasChanged()
 {
     GuardLocker guard(m_ignoreChanges);
diff --git a/src/plugins/diffeditor/diffeditor.h b/src/plugins/diffeditor/diffeditor.h
index 60f7a772140..e42157ec503 100644
--- a/src/plugins/diffeditor/diffeditor.h
+++ b/src/plugins/diffeditor/diffeditor.h
@@ -16,8 +16,6 @@ class QToolBar;
 class QStackedWidget;
 QT_END_NAMESPACE
 
-namespace TextEditor { class TextEditorWidget; }
-
 namespace DiffEditor::Internal {
 
 class DescriptionEditorWidget;
@@ -37,9 +35,6 @@ public:
     Core::IEditor *duplicate() override;
     Core::IDocument *document() const override;
     QWidget *toolBar() override;
-    TextEditor::TextEditorWidget *descriptionWidget() const;
-    TextEditor::TextEditorWidget *unifiedEditorWidget() const;
-    TextEditor::TextEditorWidget *sideEditorWidget(DiffSide side) const;
 
 private:
     DiffEditor();
diff --git a/src/plugins/diffeditor/diffeditorfactory.cpp b/src/plugins/diffeditor/diffeditorfactory.cpp
index a3981ed49b1..775a90db22d 100644
--- a/src/plugins/diffeditor/diffeditorfactory.cpp
+++ b/src/plugins/diffeditor/diffeditorfactory.cpp
@@ -10,7 +10,6 @@
 #include <QCoreApplication>
 
 using namespace Core;
-using namespace TextEditor;
 using namespace Utils;
 
 namespace DiffEditor::Internal {
diff --git a/src/plugins/diffeditor/diffview.cpp b/src/plugins/diffeditor/diffview.cpp
index 1b513aefc33..b3652bd0f0b 100644
--- a/src/plugins/diffeditor/diffview.cpp
+++ b/src/plugins/diffeditor/diffview.cpp
@@ -77,11 +77,6 @@ UnifiedView::UnifiedView()
 }
 
 QWidget *UnifiedView::widget()
-{
-    return textEditorWidget();
-}
-
-TextEditor::TextEditorWidget *UnifiedView::textEditorWidget()
 {
     if (!m_widget) {
         m_widget = new UnifiedDiffEditorWidget;
@@ -166,12 +161,6 @@ QWidget *SideBySideView::widget()
     return m_widget;
 }
 
-TextEditor::TextEditorWidget *SideBySideView::sideEditorWidget(DiffSide side)
-{
-    widget(); // ensure widget creation
-    return m_widget->sideEditorWidget(side);
-}
-
 void SideBySideView::setDocument(DiffEditorDocument *document)
 {
     QTC_ASSERT(m_widget, return);
diff --git a/src/plugins/diffeditor/diffview.h b/src/plugins/diffeditor/diffview.h
index 07e4c1d1863..5e044203cda 100644
--- a/src/plugins/diffeditor/diffview.h
+++ b/src/plugins/diffeditor/diffview.h
@@ -15,8 +15,6 @@ QT_BEGIN_NAMESPACE
 class QWidget;
 QT_END_NAMESPACE
 
-namespace TextEditor { class TextEditorWidget; }
-
 namespace DiffEditor {
 
 class FileData;
@@ -77,7 +75,6 @@ public:
     UnifiedView();
 
     QWidget *widget() override;
-    TextEditor::TextEditorWidget *textEditorWidget();
 
     void setDocument(DiffEditorDocument *document) override;
 
@@ -101,7 +98,6 @@ public:
     SideBySideView();
 
     QWidget *widget() override;
-    TextEditor::TextEditorWidget *sideEditorWidget(DiffSide side);
 
     void setDocument(DiffEditorDocument *document) override;
 
diff --git a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
index 1013adc9e94..c173ee30aa3 100644
--- a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
+++ b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
@@ -776,11 +776,6 @@ SideBySideDiffEditorWidget::SideBySideDiffEditorWidget(QWidget *parent)
 
 SideBySideDiffEditorWidget::~SideBySideDiffEditorWidget() = default;
 
-TextEditorWidget *SideBySideDiffEditorWidget::sideEditorWidget(DiffSide side) const
-{
-    return m_editor[side];
-}
-
 void SideBySideDiffEditorWidget::setDocument(DiffEditorDocument *document)
 {
     m_controller.setDocument(document);
diff --git a/src/plugins/diffeditor/sidebysidediffeditorwidget.h b/src/plugins/diffeditor/sidebysidediffeditorwidget.h
index b56fea7da02..a7e69fc2d6e 100644
--- a/src/plugins/diffeditor/sidebysidediffeditorwidget.h
+++ b/src/plugins/diffeditor/sidebysidediffeditorwidget.h
@@ -13,7 +13,6 @@ namespace Core { class IContext; }
 
 namespace TextEditor {
 class FontSettings;
-class TextEditorWidget;
 }
 
 namespace Utils {
@@ -100,8 +99,6 @@ public:
     explicit SideBySideDiffEditorWidget(QWidget *parent = nullptr);
     ~SideBySideDiffEditorWidget();
 
-    TextEditor::TextEditorWidget *sideEditorWidget(DiffSide side) const;
-
     void setDocument(DiffEditorDocument *document);
     DiffEditorDocument *diffDocument() const;