diff --git a/gui/include/Visualization/IVisualizationWidget.h b/gui/include/Visualization/IVisualizationWidget.h
index 4bbafbb..5713a2a 100644
--- a/gui/include/Visualization/IVisualizationWidget.h
+++ b/gui/include/Visualization/IVisualizationWidget.h
@@ -18,7 +18,6 @@ public:
 
     /// Initializes the plugin
     virtual void accept(IVisualizationWidgetVisitor *visitor) = 0;
-    virtual void close() = 0;
     virtual QString name() const = 0;
 };
 
diff --git a/gui/include/Visualization/VisualizationGraphWidget.h b/gui/include/Visualization/VisualizationGraphWidget.h
index d23cbc5..367d198 100644
--- a/gui/include/Visualization/VisualizationGraphWidget.h
+++ b/gui/include/Visualization/VisualizationGraphWidget.h
@@ -31,7 +31,6 @@ public:
     // IVisualizationWidget interface
     void accept(IVisualizationWidgetVisitor *visitor) override;
     bool canDrop(const Variable &variable) const override;
-    void close() override;
     QString name() const override;
 
     void updateDisplay(std::shared_ptr<Variable> variable);
diff --git a/gui/include/Visualization/VisualizationTabWidget.h b/gui/include/Visualization/VisualizationTabWidget.h
index 2adcb91..9fb0184 100644
--- a/gui/include/Visualization/VisualizationTabWidget.h
+++ b/gui/include/Visualization/VisualizationTabWidget.h
@@ -41,7 +41,6 @@ public:
     // IVisualizationWidget interface
     void accept(IVisualizationWidgetVisitor *visitor) override;
     bool canDrop(const Variable &variable) const override;
-    void close() override;
     QString name() const override;
 
 private:
diff --git a/gui/include/Visualization/VisualizationWidget.h b/gui/include/Visualization/VisualizationWidget.h
index ca74bdf..19de58a 100644
--- a/gui/include/Visualization/VisualizationWidget.h
+++ b/gui/include/Visualization/VisualizationWidget.h
@@ -35,7 +35,6 @@ public:
     // IVisualizationWidget interface
     void accept(IVisualizationWidgetVisitor *visitor) override;
     bool canDrop(const Variable &variable) const override;
-    void close() override;
     QString name() const override;
 
 public slots:
diff --git a/gui/include/Visualization/VisualizationZoneWidget.h b/gui/include/Visualization/VisualizationZoneWidget.h
index 9aa4a78..20b22e5 100644
--- a/gui/include/Visualization/VisualizationZoneWidget.h
+++ b/gui/include/Visualization/VisualizationZoneWidget.h
@@ -38,7 +38,6 @@ public:
     // IVisualizationWidget interface
     void accept(IVisualizationWidgetVisitor *visitor) override;
     bool canDrop(const Variable &variable) const override;
-    void close() override;
     QString name() const override;
 
 private:
diff --git a/gui/src/Visualization/VisualizationGraphWidget.cpp b/gui/src/Visualization/VisualizationGraphWidget.cpp
index edd5cd3..14fe8b7 100644
--- a/gui/src/Visualization/VisualizationGraphWidget.cpp
+++ b/gui/src/Visualization/VisualizationGraphWidget.cpp
@@ -88,12 +88,6 @@ bool VisualizationGraphWidget::canDrop(const Variable &variable) const
     return true;
 }
 
-void VisualizationGraphWidget::close()
-{
-    // The main view cannot be directly closed.
-    return;
-}
-
 QString VisualizationGraphWidget::name() const
 {
     if (auto title = dynamic_cast<QCPTextElement *>(ui->widget->plotLayout()->elementAt(0))) {
diff --git a/gui/src/Visualization/VisualizationTabWidget.cpp b/gui/src/Visualization/VisualizationTabWidget.cpp
index 7d68276..3911ee1 100644
--- a/gui/src/Visualization/VisualizationTabWidget.cpp
+++ b/gui/src/Visualization/VisualizationTabWidget.cpp
@@ -93,12 +93,6 @@ bool VisualizationTabWidget::canDrop(const Variable &variable) const
     return true;
 }
 
-void VisualizationTabWidget::close()
-{
-    // The main view cannot be directly closed.
-    return;
-}
-
 QString VisualizationTabWidget::name() const
 {
     return impl->m_Name;
diff --git a/gui/src/Visualization/VisualizationWidget.cpp b/gui/src/Visualization/VisualizationWidget.cpp
index cccc592..ef992ef 100644
--- a/gui/src/Visualization/VisualizationWidget.cpp
+++ b/gui/src/Visualization/VisualizationWidget.cpp
@@ -111,12 +111,6 @@ bool VisualizationWidget::canDrop(const Variable &variable) const
     return false;
 }
 
-void VisualizationWidget::close()
-{
-    // The main view cannot be directly closed.
-    return;
-}
-
 QString VisualizationWidget::name() const
 {
     return QStringLiteral("MainView");
diff --git a/gui/src/Visualization/VisualizationZoneWidget.cpp b/gui/src/Visualization/VisualizationZoneWidget.cpp
index 0d60830..cedd644 100644
--- a/gui/src/Visualization/VisualizationZoneWidget.cpp
+++ b/gui/src/Visualization/VisualizationZoneWidget.cpp
@@ -88,12 +88,6 @@ bool VisualizationZoneWidget::canDrop(const Variable &variable) const
     return true;
 }
 
-void VisualizationZoneWidget::close()
-{
-    // The main view cannot be directly closed.
-    return;
-}
-
 QString VisualizationZoneWidget::name() const
 {
     return ui->zoneNameLabel->text();