Revert "Merge tag '1.4.3'" am: 7b14046dc7 am: 24caef6fb1 am: f590b4da3c

Original change: https://android-review.googlesource.com/c/platform/external/kotlinx.coroutines/+/1705631

Change-Id: Icaee3463b47acc5c41c2e3b02ce5d68979097aa1