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/registry/CapabilityRegistry.java
else
            return null;
    }
    /**
     * Returns the list of categories in the registry
     * which contain at least one capability. Does not
     * include the misc and unknown categories.
     */
    public ArrayList getUsedCategories() {
        ArrayList results = new ArrayList(categories.size());
        Iterator itr = categories.iterator();
        while (itr.hasNext()) {
            Category cat = (Category) itr.next();
            if (cat.hasElements())
                results.add(cat);
        }
        return results;
    }
    /**
     * Returns the capability for the nature id
     */
    public Capability getCapabilityForNature(String natureId) {
        return (Capability) natureToCapability.get(natureId);
    }
    /**
     * Returns the list of capabilities in the registry
     */
    public ArrayList getCapabilities() {
        return capabilities;
    }