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/misc/ProjectCapabilitySelectionGroup.java
Capability[] capabilities, Capability[] disabledCapabilities,
            CapabilityRegistry registry) {
        super();
        this.initialCategories = categories;
        this.initialCapabilities = capabilities;
        this.disabledCapabilities = disabledCapabilities;
        this.registry = registry;
    }
    /**
     * Create the contents of this group. The basic layout is a checkbox
     * list with a text field at the bottom to display the capability
     * description.
     */
    public Control createContents(Composite parent) {
        Font font = parent.getFont();
        
        Composite composite = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout();
        layout.numColumns = 2;
        layout.makeColumnsEqualWidth = true;
        composite.setLayout(layout);
        composite.setLayoutData(new GridData(GridData.FILL_BOTH));
        
        Composite catComposite = new Composite(composite, SWT.NONE);
        catComposite.setLayout(new GridLayout());
        catComposite.setLayoutData(new GridData(GridData.FILL_BOTH));
        
        Label categoryLabel = new Label(catComposite, SWT.LEFT);
        categoryLabel.setText(IDEWorkbenchMessages.ProjectCapabilitySelectionGroup_categories);
        GridData data = new GridData();