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/actions/CreateProjectAction.java
return selectionToPass;
    }
    /**
     * Sets the initial categories to be selected. Ignores
     * any IDs which do not represent valid categories.
     * 
     * @param ids initial category ids to select
     */
    public void setInitialSelectedCategories(String[] ids) {
        if (ids == null || ids.length == 0)
            initialSelectedCategories = null;
        else {
            CapabilityRegistry reg = IDEWorkbenchPlugin.getDefault()
                    .getCapabilityRegistry();
            ArrayList results = new ArrayList(ids.length);
            for (int i = 0; i < ids.length; i++) {
                Category cat = reg.findCategory(ids[i]);
                if (cat != null)
                    results.add(cat);
            }
            if (results.isEmpty())
                initialSelectedCategories = null;
            else {
                initialSelectedCategories = new Category[results.size()];
                results.toArray(initialSelectedCategories);
            }
        }
    }
    /**
     * Sets the initial project capabilities to be selected.