remove deferred from request object before resolving
remove deferred from request object before resolving

CesiumGS/cesium,CesiumGS/cesium,CesiumGS/cesium,progsung/cesium,AnalyticalGraphicsInc/cesium,progsung/cesium,likangning93/cesium,likangning93/cesium,likangning93/cesium,likangning93/cesium,CesiumGS/cesium,CesiumGS/cesium,likangning93/cesium,AnalyticalGraphicsInc/cesium