Interactive_ui_tests don't run well on win8+ machines yet.

testing/buildbot/chromium.win.json

 {
   "Win 7 Tests x64 (1)": {
     "gtest_tests": [
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "accessibility_unittests"
       },
       {
@@ skipping 1032 matching lines @@
         "test": "gpu_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "installer_util_unittests"
       },
       {
         "swarming": {
-          "can_use_on_swarming_builders": true,
-          "shards": 2
-        },
-        "test": "interactive_ui_tests"
-      },
-      {
-        "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "ipc_tests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "jingle_unittests"
       },
@@ skipping 1129 matching lines @@
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "events_unittests"
       }
     ]
   }
 }