Remove Chrome canary buildslave hosts
Remove Chrome canary buildslave hosts

BUG=skia:

Review-Url: https://codereview.chromium.org/1988273002

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