remove unnecessary code from DownloadManager
remove unnecessary code from DownloadManager

Change-Id: Ief1693785f0484c1b434fb41a68693f9aff96492

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base