Revert "Enable thread exit checks for bionic"

This reverts commit 480263c191e49f9f766c643a9c295e9c42b799aa.

Reason for revert: DroidMonitor: Potential culprit for http://b/406573423 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I1796db379c64218505ee967006f8007044c3a8e0
2 files changed