Milo: Remove swarming tags from build properties

milo/appengine/swarming/expectations/build-expired.json

Index: milo/appengine/swarming/expectations/build-expired.json
diff --git a/milo/appengine/swarming/expectations/build-expired.json b/milo/appengine/swarming/expectations/build-expired.json
index 4eccc6442edc81196c3c39d57d9f0fc395bd87a2..b540dc3ddb5f0de27fb57ac1d2f73df9bca45189 100644
--- a/milo/appengine/swarming/expectations/build-expired.json
+++ b/milo/appengine/swarming/expectations/build-expired.json
@@ -18,6 +18,10 @@
       "Device": null
     },
     "Bot": null,
+    "Recipe": {
+      "Label": "infra_repo_trybot",
+      "URL": "https://chromium.googlesource.com/infra/infra/+/master/infra_repo_trybot.py"
+    },
     "Source": {
       "Label": "Task 308998ca182a0210",
       "URL": "https://debug/user/task/308998ca182a0210"
@@ -38,81 +42,25 @@
       "Task expired"
     ]
   },
-  "SourceStamp": null,
+  "SourceStamp": {
+    "AuthorName": "",
+    "AuthorEmail": "",
+    "Repo": "",
+    "Branch": "",
+    "RequestRevision": "",
+    "Revision": "",
+    "Description": "",
+    "Title": "",
+    "Changelist": null,
+    "CommitURL": "",
+    "File": null,
+    "Source": ""
+  },
   "Components": null,
   "PropertyGroup": [
     {
       "GroupName": "Main",
       "Property": null
-    },
-    {
-      "GroupName": "Swarming Tags",
-      "Property": [
-        {
-          "Key": "allow_milo",
-          "Value": "1"
-        },
-        {
-          "Key": "buildbucket_bucket",
-          "Value": "luci.infra.try"
-        },
-        {
-          "Key": "buildbucket_hostname",
-          "Value": "cr-buildbucket.appspot.com"
-        },
-        {
-          "Key": "buildbucket_template_canary",
-          "Value": "false"
-        },
-        {
-          "Key": "builder",
-          "Value": "Infra Win Tester"
-        },
-        {
-          "Key": "buildset",
-          "Value": "patch/rietveld/codereview.chromium.org/2225073005/1"
-        },
-        {
-          "Key": "cpu",
-          "Value": "x86-64"
-        },
-        {
-          "Key": "master",
-          "Value": "luci.infra.try"
-        },
-        {
-          "Key": "os",
-          "Value": "Windows-7-SP1"
-        },
-        {
-          "Key": "pool",
-          "Value": "Chrome"
-        },
-        {
-          "Key": "priority",
-          "Value": "100"
-        },
-        {
-          "Key": "recipe_name",
-          "Value": "infra_repo_trybot"
-        },
-        {
-          "Key": "recipe_repository",
-          "Value": "https://chromium.googlesource.com/infra/infra"
-        },
-        {
-          "Key": "recipe_revision",
-          "Value": ""
-        },
-        {
-          "Key": "user",
-          "Value": ""
-        },
-        {
-          "Key": "user_agent",
-          "Value": "cq"
-        }
-      ]
     }
   ],
   "Blame": null