Base.ui: Revert r23780.

* The removed method is required by deployment.ui.
* Improved the comment why the removed method is required (but empty).

org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editpart/allocation/.ratings

@@ -4,5 +4,5 @@ AllocationElementEditPartBase.java a878f838d44d35978b1ac6ae4da52fd1aaa300f7 GREE
 AllocationFreeConnectorEditPartBase.java d6f602170056b5c020477a8863e753f19a8cc444 GREEN
 AllocationPositionService.java 0efc15deec12730ac7ba02fb2ccb66833b783ffd GREEN
 AllocationStickyConnectorEditPartBase.java 52d43906d4eedd9d3e31058fff67d40c43ffddb2 GREEN
-AllocationSubDiagramEditPartBase.java 6e429e036a303453f3df71ee00817666fd6709bb YELLOW
+AllocationSubDiagramEditPartBase.java b0f3c53c4dcafb10264c2ba8707b4704e5e7937a YELLOW
 IAllocationPositionService.java e531ff569354711697ce7e30a361ba0dc317645d GREEN

org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editpart/allocation/AllocationSubDiagramEditPartBase.java

@@ -263,6 +263,12 @@ public abstract class AllocationSubDiagramEditPartBase<T extends INamedCommented
 		return false;
 	}
 
+	/** {@inheritDoc} */
+	@Override
+	protected void createEditPolicies() {
+		// Must be overridden, but the method is not relevant for allocation editors.
+	}
+
 	/** Returns the foreground color used. */
 	protected abstract Color getForegroundColor();