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/extensions/org/eclipse/ui/ICapabilityInstallWizard.java
/**
     * Initializes this capability wizard using the passed workbench,
     * object selection, and project.
     * <p>
     * This method is called after the no argument constructor and
     * before other methods are called.
     * </p>
     *
     * @param workbench the current workbench
     * @param selection the current object selection
     * @param project the project to configure with a capability
     */
    public void init(IWorkbench workbench, IStructuredSelection selection,
            IProject project);
}