Merge "libutils: remove obsolete README." am: c85c9ee4e6 am: 542b434331 am: 47f22f9ba7 am: 6801ff60bb

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1703649

Change-Id: I4cea6f36b9f049f68c9c6f44e7721f51a0decc04