Bug 126779 [IDE] Removed deprecated project capabilities API and implementation
It was created then deprecated before 2.0 shipped. As has never been API and we don't use it we should delete it.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/UpdateProjectCapabilityWizard.java
private IProject project;
    private Capability[] addCapabilities;
    private Capability[] removeCapabilities;
    /**
     * Creates a wizard.