diff --git a/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/.ratings b/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/.ratings
index bb792d751fd145c7f971bd3c8982110b44e896ae..d79b33d0452965cb445b876a5e2754247a4cc311 100644
--- a/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/.ratings
+++ b/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/.ratings
@@ -1,6 +1,6 @@
 AdvancedTreeViewerEditorBase.java 9d9eded6848ee78991d1416592d1136efd71d2b7 GREEN
 AllocationDiagramEditorBase.java fa544546f73eea1150d90b7257b0e6bce82c288c GREEN
-CommonDiagramEditorBase.java bcb3cafd8320197e7c78b772f1d0025330df4379 YELLOW
+CommonDiagramEditorBase.java 3a3a0137561c13403c8d731434e4fd5f00d9c86f GREEN
 ConstraintBasedProcessEditor.java 155a5a7ac41c668ae7ef978e8be13b83f5abd67d GREEN
 ConstraintBasedProcessEditorHelper.java 11d48e8a2aecd48eea259a42ef1192c4b292a334 GREEN
 DiagramEditorBase.java 09663ce095074d1a8eef086284eea0a7776e0431 GREEN
diff --git a/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/CommonDiagramEditorBase.java b/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/CommonDiagramEditorBase.java
index bcb3cafd8320197e7c78b772f1d0025330df4379..3a3a0137561c13403c8d731434e4fd5f00d9c86f 100644
--- a/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/CommonDiagramEditorBase.java
+++ b/org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/CommonDiagramEditorBase.java
@@ -71,7 +71,6 @@ import org.eclipse.gef.ui.actions.PrintAction;
 import org.eclipse.gef.ui.actions.SelectAllAction;
 import org.eclipse.gef.ui.actions.SelectionAction;
 import org.eclipse.gef.ui.actions.UpdateAction;
-import org.eclipse.gef.ui.actions.ZoomComboContributionItem;
 import org.eclipse.gef.ui.actions.ZoomInAction;
 import org.eclipse.gef.ui.actions.ZoomOutAction;
 import org.eclipse.jface.action.IAction;
@@ -136,9 +135,6 @@ abstract class CommonDiagramEditorBase<T extends EObject> extends GEFEditorBase<
 	/** Stores the zoom manager. */
 	private ZoomManager zoomManager;
 
-	/** Stores the zoom contribution item. */
-	private ZoomComboContributionItem zoomContribution;
-
 	/** A container for editor actions. */
 	private final ActionRegistry actionRegistry = new ActionRegistry();