Generate realms.cfg, drop unreferenced config entries.

R=rmistry@google.com
BUG=skia:12502

Change-Id: I5a5877016cea53852dc23e432fea85a8c7bf581e
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/455741
Auto-Submit: Vadim Shtayura <vadimsh@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
diff --git a/generated/realms.cfg b/generated/realms.cfg
new file mode 100644
index 0000000..f919a1c
--- /dev/null
+++ b/generated/realms.cfg
@@ -0,0 +1,21 @@
+# Auto-generated by lucicfg.
+# Do not modify manually.
+#
+# For the schema of this file, see RealmsCfg message:
+#   https://luci-config.appspot.com/schemas/projects:realms.cfg
+
+realms {
+  name: "@root"
+  bindings {
+    role: "role/configs.reader"
+    principals: "group:all"
+  }
+  bindings {
+    role: "role/logdog.reader"
+    principals: "group:all"
+  }
+  bindings {
+    role: "role/logdog.writer"
+    principals: "group:luci-logdog-skia-writers"
+  }
+}
diff --git a/main.star b/main.star
index f927052..c0b773a 100755
--- a/main.star
+++ b/main.star
@@ -1,15 +1,14 @@
 #!/usr/bin/env lucicfg
 
+# Enable LUCI Realms support.
+lucicfg.enable_experiment("crbug.com/1085650")
+
 luci.project(
     name = "Skia Buildbot",
-    buildbucket = "cr-buildbucket.appspot.com",
-    swarming = "chromium-swarm.appspot.com",
     acls = [
         acl.entry(acl.PROJECT_CONFIGS_READER, groups = [ "all" ]),
         acl.entry(acl.LOGDOG_READER, groups = [ "all" ]),
         acl.entry(acl.LOGDOG_WRITER, groups = [ "luci-logdog-skia-writers" ]),
-        acl.entry(acl.CQ_COMMITTER, groups = [ "project-skia-committers" ]),
-        acl.entry(acl.CQ_DRY_RUNNER, groups = [ "project-skia-tryjob-access" ]),
     ],
     logdog = "luci-logdog",
 )