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
logMissingAttribute(element, ATT_ID);
        }
        if (currentCapability != null)
            currentCapability.addHandleUI(capabilityId);
        return true;
    }
    /**
     * Reads perspectiveChoice elements. These elements contain the ids of
     * perspectives.
     */
    private boolean readPerspectiveChoice(IConfigurationElement element) {
        String perspId = element.getAttribute(ATT_ID);
        if (perspId == null) {
            logMissingAttribute(element, ATT_ID);
        }
        if (currentCapability != null)
            currentCapability.addPerspectiveChoice(perspId);
        return true;
    }
    /**
     * Reads project capabilities and capability categories from the provided
     * plugin registry and stores them in the provided capability registry.
     */
    public void read(IExtensionRegistry registry, CapabilityRegistry out) {
        capabilityRegistry = out;
        readRegistry(registry, IDEWorkbenchPlugin.IDE_WORKBENCH,
                IDEWorkbenchPlugin.PL_CAPABILITIES);
    }
}