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/ProjectCapabilitySimpleSelectionPage.java
this.selection = selection;
        this.project = project;
        this.reg = IDEWorkbenchPlugin.getDefault().getCapabilityRegistry();
    }
    /* (non-Javadoc)
     * Method declared on IWizardPage
     */
    public boolean canFlipToNextPage() {
        return isPageComplete();
    }
    /* (non-Javadoc)
     * Method declared on IDialogPage
     */
    public void createControl(Composite parent) {
        Font font = parent.getFont();
        Composite topContainer = new Composite(parent, SWT.NONE);
        topContainer.setLayout(new GridLayout());
        topContainer.setLayoutData(new GridData(GridData.FILL_BOTH));
        Label label = new Label(topContainer, SWT.LEFT);
        label.setText(IDEWorkbenchMessages.ProjectCapabilitySelectionGroup_capabilities);
        GridData data = new GridData();
        data.verticalAlignment = SWT.TOP;
        label.setLayoutData(data);
        label.setFont(font);
        viewer = new TreeViewer(topContainer, SWT.SINGLE | SWT.H_SCROLL
                | SWT.V_SCROLL | SWT.BORDER);
        viewer.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));
        viewer.getTree().setFont(font);
        viewer.setLabelProvider(new WorkbenchLabelProvider());
        viewer.setContentProvider(getContentProvider());