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/ProjectCapabilitySimpleAddWizard.java
private ProjectCapabilitySimpleSelectionPage mainPage;
    private IWorkbench workbench;
    private IStructuredSelection selection;
    private IProject project;
    public ProjectCapabilitySimpleAddWizard(IWorkbench workbench,
            IStructuredSelection selection, IProject project) {
        super();
        this.workbench = workbench;
        this.selection = selection;
        this.project = project;
        setForcePreviousAndNextButtons(true);
        setNeedsProgressMonitor(true);
        initializeDefaultPageImageDescriptor();
        setWindowTitle(IDEWorkbenchMessages.ProjectCapabilitySimpleSelectionPage_windowTitle);
    }
    /* (non-Javadoc)
     * Method declared on IWizard