Nhat Nguyen 5bc8a859c6 Remove ban tasks with the current thread context (#55404)
If we start unbanning when the last child task completed and that child 
task executed with a specific user, then unban requests are denied
because internal requests can't run with a user. We need to remove bans
with the current thread context.
2020-04-17 13:49:19 -04:00
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