diff --git "a/tools_webrtc/ios/client.webrtc.branches/iOS \050beta\051.json" "b/tools_webrtc/ios/client.webrtc.branches/iOS \050beta\051.json"
deleted file mode 100644
index 5ab132e..0000000
--- "a/tools_webrtc/ios/client.webrtc.branches/iOS \050beta\051.json"
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-  "comments": [
-    "Tests for 64-bit iOS simulators."
-  ],
-  "xcode build version": "9C40b",
-  "gn_args": [
-    "goma_dir=\"$(goma_dir)\"",
-    "is_component_build=false",
-    "is_debug=true",
-    "target_cpu=\"x64\"",
-    "target_os=\"ios\"",
-    "use_goma=true"
-  ],
-  "additional_compile_targets": [],
-  "configuration": "Debug",
-  "sdk": "iphonesimulator10.3",
-  "tests": [
-    {
-      "include": "common_tests.json",
-      "device type": "iPhone 6s",
-      "os": "10.3",
-      "dimensions": [
-        {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13.3",
-          "pool": "Chrome"
-        }
-      ]
-    }
-  ]
-}
diff --git "a/tools_webrtc/ios/client.webrtc.branches/iOS \050stable\051.json" "b/tools_webrtc/ios/client.webrtc.branches/iOS \050stable\051.json"
deleted file mode 100644
index 5ab132e..0000000
--- "a/tools_webrtc/ios/client.webrtc.branches/iOS \050stable\051.json"
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-  "comments": [
-    "Tests for 64-bit iOS simulators."
-  ],
-  "xcode build version": "9C40b",
-  "gn_args": [
-    "goma_dir=\"$(goma_dir)\"",
-    "is_component_build=false",
-    "is_debug=true",
-    "target_cpu=\"x64\"",
-    "target_os=\"ios\"",
-    "use_goma=true"
-  ],
-  "additional_compile_targets": [],
-  "configuration": "Debug",
-  "sdk": "iphonesimulator10.3",
-  "tests": [
-    {
-      "include": "common_tests.json",
-      "device type": "iPhone 6s",
-      "os": "10.3",
-      "dimensions": [
-        {
-          "os": "Mac-10.12",
-          "pool": "Chrome"
-        },
-        {
-          "os": "Mac-10.13.3",
-          "pool": "Chrome"
-        }
-      ]
-    }
-  ]
-}
diff --git a/tools_webrtc/mb/mb_config.pyl b/tools_webrtc/mb/mb_config.pyl
index dca973b..ebdafe1 100644
--- a/tools_webrtc/mb/mb_config.pyl
+++ b/tools_webrtc/mb/mb_config.pyl
@@ -105,27 +105,6 @@
           'rtti_no_sctp_x86',
       },
     },
-    'client.webrtc.branches': {
-      # iOS
-      'iOS (stable)': 'ios',
-      'iOS (beta)': 'ios',
-
-      # Mac
-      'Mac (stable)': 'release_bot_x64',
-      'Mac (beta)': 'release_bot_x64',
-
-      # Linux
-      'Linux (stable)': 'release_bot_x64',
-      'Linux (beta)': 'release_bot_x64',
-
-      # Android
-      'Android (stable)': 'android_release_bot_arm',
-      'Android (beta)': 'android_release_bot_arm',
-
-      # Windows
-      'Win (stable)': 'release_bot_x86',
-      'Win (beta)': 'release_bot_x86',
-    },
     'client.webrtc.perf': {
       # Android
       'Android32 Builder': 'perf_android_release_bot_arm',