Remove bucket definitions for buildbot masters.

Change-Id: I70de7cb2f4d273f00d02a5421ab816cbf08efe6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1829479
Commit-Queue: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700793}

infra/config/cr-buildbucket.cfg

@@ -6,22 +6,6 @@
 #
 # Please keep this list sorted by bucket name.
 
-acl_sets {
-  name: "waterfall"
-  acls {
-    role: READER
-    group: "all"
-  }
-  acls {
-    role: SCHEDULER
-    identity: "luci-scheduler@appspot.gserviceaccount.com"
-  }
-  acls {
-    role: WRITER
-    group: "service-account-chromium-master"
-  }
-}
-
 acl_sets {
   # This is pure-LUCI CI w/o buildbot.
   name: "ci"
@@ -3909,78 +3893,9 @@ buckets {
   }
 }
 
-buckets {
-  name: "master.chromium.android.fyi"
-  acl_sets: "waterfall"
-}
-
-buckets {
-  name: "master.chromium.perf"
-  acl_sets: "waterfall"
-}
-
-buckets {
-  name: "master.chromium.perf.fyi"
-  acl_sets: "waterfall"
-}
-
-# Defining blink build bucket in chromium/src repo because
-# blink will merge to chromium/src.
-# Also git admins are reluctant to create infra/config branches
-# in svn-based git repos (crbug.com/513580).
-buckets {
-  name: "master.tryserver.blink"
-  acl_sets: "tryserver"
-}
-
-buckets {
-  name: "master.tryserver.chromium.android"
-  acl_sets: "tryserver"
-}
-
-buckets {
-  name: "master.tryserver.chromium.chromiumos"
-  acl_sets: "tryserver"
-}
-
-buckets {
-  name: "master.tryserver.chromium.gpu"
-  acl_sets: "tryserver"
-}
-
-buckets {
-  name: "master.tryserver.chromium.linux"
-  acl_sets: "tryserver"
-}
-
-buckets {
-  name: "master.tryserver.chromium.mac"
-  acl_sets: "tryserver"
-}
-
-buckets {
-  name: "master.tryserver.chromium.perf"
-  acl_sets: "tryserver"
-  acls {
-    role: SCHEDULER
-    group: "service-account-chromium-bisect"
-  }
-  acls {
-    role: SCHEDULER
-    group: "service-account-chromeperf"
-  }
-}
-
-buckets {
-  name: "master.tryserver.chromium.win"
-  acl_sets: "tryserver"
-}
-
 buckets {
   name: "try"
 
-  # NOTE: these ACLs should be kept in sync with those in the other
-  # "master.tryserver.chromium.*" buckets.
   acl_sets: "tryserver"
 
   swarming {