bpo-33723: Remove time.thread_time() functional tests by vstinner · Pull Request #8265 · python/cpython
These functional tests were too fragile: we already tolerate to only
get a delta of 20 ms whereas the test runs a busy loop during 100 ms.
The test failed on a buildbot because the delta was only 19 ms.
Reducing the minimum delta would make the test meaningless, so remove
it instead.