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/CapabilityRegistryReader.java
currentCapability = null;
            return true;
        } catch (WorkbenchException e) {
            currentCapability = null;
            return false;
        }
    }
    /**
     * Reads a capability category and adds it to the capability registry.
     */
    private boolean readCategory(IConfigurationElement element) {
        try {
            Category category = new Category(element);
            capabilityRegistry.addCategory(category);
        } catch (WorkbenchException e) {
            
            IDEWorkbenchPlugin.log(
                    "Unable to create capability category. ", e.getStatus()); 
        }
        return true;
    }
    /**
     * Reads handleUI elements. These elements contain the ids of other
     * capabilities. The capability that is the parent of the handleUI element
     * controls the user interface for the capabilities whose ids are stored
     * in the handleUI element.
     */
    private boolean readHandleUI(IConfigurationElement element) {
        String capabilityId = element.getAttribute(ATT_ID);
        if (capabilityId == null) {