diff --git a/infra/config/config.star b/infra/config/config.star
index 8955686887..8a42399d9c 100755
--- a/infra/config/config.star
+++ b/infra/config/config.star
@@ -52,7 +52,9 @@ def os_from_name(name):
 # Add names of builders to remove from LKGR finder to this list. This is
 # useful when a failure can be safely ignored while fixing it without
 # blocking the LKGR finder on it.
-skipped_lkgr_bots = []
+skipped_lkgr_bots = [
+    "iOS Debug (simulator)",
+]
 
 # Use LUCI Scheduler BBv2 names and add Scheduler realms configs.
 lucicfg.enable_experiment("crbug.com/1182002")
diff --git a/infra/config/cr-buildbucket.cfg b/infra/config/cr-buildbucket.cfg
index 456fe1fac0..9edb6a2cc6 100644
--- a/infra/config/cr-buildbucket.cfg
+++ b/infra/config/cr-buildbucket.cfg
@@ -1903,7 +1903,6 @@ buckets {
         '          "Win64 Debug (Clang)",'
         '          "Win64 Release (Clang)",'
         '          "iOS API Framework Builder",'
-        '          "iOS Debug (simulator)",'
         '          "iOS64 Debug",'
         '          "iOS64 Release"'
         '        ]'
diff --git a/infra/config/luci-notify.cfg b/infra/config/luci-notify.cfg
index 53a6c5eb3b..e2835fb848 100644
--- a/infra/config/luci-notify.cfg
+++ b/infra/config/luci-notify.cfg
@@ -943,11 +943,6 @@ notifiers {
     name: "iOS Debug (simulator)"
     repository: "https://webrtc.googlesource.com/src"
   }
-  tree_closers {
-    tree_status_host: "webrtc-status.appspot.com"
-    failed_step_regexp: "bot_update|compile|gclient runhooks|runhooks|update|extract build|cleanup_temp|taskkill|compile|gn"
-    failed_step_regexp_exclude: ".*\\(experimental\\).*"
-  }
 }
 notifiers {
   notifications {
diff --git a/infra/config/project.cfg b/infra/config/project.cfg
index 7ee089eda0..8b377430f3 100644
--- a/infra/config/project.cfg
+++ b/infra/config/project.cfg
@@ -7,7 +7,7 @@
 name: "webrtc"
 access: "group:all"
 lucicfg {
-  version: "1.43.8"
+  version: "1.43.9"
   package_dir: "."
   config_dir: "."
   entry_point: "config.star"