Take ash_content_unitests off the Windows bots

testing/buildbot/chromium.win.json

Index: testing/buildbot/chromium.win.json
diff --git a/testing/buildbot/chromium.win.json b/testing/buildbot/chromium.win.json
index b94763bd6b3af7b0288eb08f62a0c87d21f312fd..b5968ca9752844abd24696a51b3251ac6c3d3ca9 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -29,12 +29,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "ash_content_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "aura_unittests"
       },
       {
@@ -541,12 +535,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "ash_content_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "aura_unittests"
       },
       {
@@ -995,12 +983,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "ash_content_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "aura_unittests"
       },
       {
@@ -1467,12 +1449,6 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
-        "test": "ash_content_unittests"
-      },
-      {
-        "swarming": {
-          "can_use_on_swarming_builders": true
-        },
         "test": "aura_unittests"
       },
       {