Bug 90249 remove workaround code for bug 85005
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
/**
		 * The workbench page we registered the partlistener with, or
		 * <code>null</code>.
		 */
		private IWorkbenchPage fPage;
		
		/**
		 * Does the actual toggling of projection.
		 */
		private void toggleFolding() {
			ISourceViewer sourceViewer= getSourceViewer();
			if (sourceViewer instanceof ProjectionViewer) {
				ProjectionViewer pv= (ProjectionViewer) sourceViewer;
				if (pv.isProjectionMode() != isFoldingEnabled()) {
					if (pv.canDoOperation(ProjectionViewer.TOGGLE))
						pv.doOperation(ProjectionViewer.TOGGLE);
				}
			}
		}
		
		/**
		 * Makes sure that the editor's folding state is correct the next time