[swarming] delete old blacklist file pattern
[swarming] delete old blacklist file pattern

swarming_smoke_test.py doesn't exist any more.

Change-Id: Ib6a1f28a4be386fba2bdd3a995c6340e3dd7e90c
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/1868488
Commit-Queue: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>
Commit-Queue: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>
Auto-Submit: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>
Reviewed-by: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py