Remove babysitter buildslaves for old infra bot
Remove babysitter buildslaves for old infra bot

BUG=skia:

Change-Id: I2c6af8f7197aadb837b1d941c97a6189d188cec8
Reviewed-on: https://skia-review.googlesource.com/4385
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot