Remove unused log4j jars am: c96c1c8ae2 am: 864702ebd6 am: 7032b0af34 am: 8023634a50 am: 0b9a14a028 am: 61c2d90272 am: 71a549ccb7

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/tools/+/16456597

Change-Id: Ic746c6cb7204902a28ce814c25c45ef754b62b4e