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/IDEWorkbenchPlugin.java
if (exc[0] != null)
                throw exc[0];
            else
                return ret[0];
        }
    }
    /* Return the default instance of the receiver. This represents the runtime plugin.
     *
     * @see AbstractPlugin for the typical implementation pattern for plugin classes.
     */
    public static IDEWorkbenchPlugin getDefault() {
        return inst;
    }
    /**
     * Return the workspace used by the workbench
     *
     * This method is internal to the workbench and must not be called
     * by any plugins.
     */
    public static IWorkspace getPluginWorkspace() {
        return ResourcesPlugin.getWorkspace();
    }
    /**
     * Logs the given message to the platform log.
     * 
     * If you have an exception in hand, call log(String, Throwable) instead.
     * 
     * If you have a status object in hand call log(String, IStatus) instead.
     * 
     * This convenience method is for internal use by the IDE Workbench only and