Remove mustash tests from X11 CrOS trybots.

testing/buildbot/chromium.chromiumos.json

Index: testing/buildbot/chromium.chromiumos.json
diff --git a/testing/buildbot/chromium.chromiumos.json b/testing/buildbot/chromium.chromiumos.json
index b67066989e4e289ca6e7a172d1d53f454e0f5de8..cbfd87fb797f733ccdf3a9b666dfc7d1b77a90c8 100644
--- a/testing/buildbot/chromium.chromiumos.json
+++ b/testing/buildbot/chromium.chromiumos.json
@@ -484,21 +484,6 @@
         "test": "base_unittests"
       },
       {
-        "args": [
-          "--override-use-gl-with-osmesa-for-tests",
-          "--run-in-mash",
-          "--service-overrides=src/chrome/app/mash/mash_service_overrides.json",
-          "--test-launcher-filter-file=src/testing/buildbot/filters/mash.browser_tests.filter",
-          "--use-test-config"
-        ],
-        "hard_timeout": 60,
-        "name": "mash_browser_tests",
-        "swarming": {
-          "can_use_on_swarming_builders": false
-        },
-        "test": "browser_tests"
-      },
-      {
         "swarming": {
           "can_use_on_swarming_builders": true,
           "shards": 5
@@ -656,15 +641,6 @@
         "test": "jingle_unittests"
       },
       {
-        "args": [
-          "--override-use-gl-with-osmesa-for-tests"
-        ],
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "mash_unittests"
-      },
-      {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
@@ -692,12 +668,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "mus_demo_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "nacl_helper_nonsfi_unittests"
       },
       {
@@ -803,18 +773,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "views_mus_interactive_ui_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "views_mus_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "views_unittests"
       },
       {
@@ -1143,18 +1101,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "views_mus_interactive_ui_tests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
-        "test": "views_mus_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "views_unittests"
       },
       {