They are needed in order to properly generate documentation: org.eclipse.ui.examples.propertysheet, org.eclipse.swt.examples, org.eclipse.compare.examples.xml, org.eclipse.swt.examples.controls, org.eclipse.swt.examples.browser, org.eclipse.ui.examples.readmetool, org.eclipse.team.examples.filesystem, org.eclipse.compare.examples, org.eclipse.swt.examples.layouts, org.eclipse.swt.examples.ole.win32, org.eclipse.ui.examples.javaeditor, org.eclipse.swt.examples.paint, org.eclipse.swt.examples.launcher, org.eclipse.ui.examples.multipageeditor, org.eclipse.ui.examples.fieldassist, org.eclipse.ui.examples.undo.
This has been fixed.