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/InstallCapabilityStep.java
private Capability capability;
    private ICapabilityInstallWizard wizard;
    private IWorkbench workbench;
    private IProjectProvider projectProvider;
    /**
     * Creates the capability install step
     * 
     * @param number step order number
     * @param capability the capability to install
     */
    public InstallCapabilityStep(int number, Capability capability,
            IWorkbench workbench, IProjectProvider projectProvider) {
        super(number);
        this.capability = capability;
        this.workbench = workbench;
        this.projectProvider = projectProvider;
    }
    /* (non-Javadoc)
     * Method declared on WizardStep.
     */
    public String getLabel() {
        return NLS.bind(IDEWorkbenchMessages.InstallCapabilityStep_label, capability.getName());