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/NewProjectWizard.java
* Builds the collection of steps to create and install
     * the chosen capabilities.
     * 
     * @return <code>true</code> if successful, <code>false</code>
     * 		if a problem was detected.
     */
    private boolean buildSteps() {
        Capability[] caps = capabilityPage.getSelectedCapabilities();
        CapabilityRegistry reg = IDEWorkbenchPlugin.getDefault()
                .getCapabilityRegistry();
        IStatus status = reg.validateCapabilities(caps);
        if (status.isOK()) {
            Capability[] results = reg.pruneCapabilities(caps);
            WizardStep[] steps = new WizardStep[results.length + 1];
            steps[0] = new CreateProjectStep(1, creationPage, this);
            for (int i = 0; i < results.length; i++)
                steps[i + 1] = new InstallCapabilityStep(i + 2, results[i],
                        workbench, this);
            setSteps(steps);
            return true;
        } else {
            ErrorDialog.openError(getShell(), IDEWorkbenchMessages.NewProjectWizard_errorTitle,
                    IDEWorkbenchMessages.NewProjectWizard_invalidCapabilities,
                    status);
            return false;
        }
    }
    /* (non-Javadoc)
     * Method declared on MultiStepWizard.
     */