Stop running nacl_integration tests on ClangToT macOS builds.

testing/buildbot/chromium.fyi.json

 {
   "Android Asan Builder Tests (dbg)": {
     "gtest_tests": [
       {
         "args": [
           "--tool=asan"
         ],
         "swarming": {
           "can_use_on_swarming_builders": false
         },
@@ skipping 4797 matching lines @@
         }
       },
       {
         "isolate_name": "telemetry_unittests",
         "name": "telemetry_unittests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "shards": 2
         }
       }
-    ],
-    "scripts": [
-      {
-        "name": "nacl_integration",
-        "script": "nacl_integration.py"
-      }
     ]
   },
   "ClangToTMacASan tester": {
     "gtest_tests": [
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "accessibility_unittests"
       },
@@ skipping 8285 matching lines @@
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": false
         },
         "test": "views_unittests"
       }
     ]
   }
 }