Remove most android-specific hard_timeout and shard overrides.

These were added during android swarming bring-up.  We shouldn't use
per-bot exceptions for this.

Also remove a random sharding setting for base_unittests on ToTMac
that doesn't look necessary.

Bug: 843511
Change-Id: Ia20771786f1b4106cd86d24d446e0a66f319dbff
Reviewed-on: https://chromium-review.googlesource.com/1134531
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574596}
7 files changed