Milo: Remove swarming tags from build properties

milo/appengine/buildbot/expectations/CrWinGoma.30608.build.json

Index: milo/appengine/buildbot/expectations/CrWinGoma.30608.build.json
diff --git a/milo/appengine/buildbot/expectations/CrWinGoma.30608.build.json b/milo/appengine/buildbot/expectations/CrWinGoma.30608.build.json
index d161f10310d11467be1264f2c1d3cda4a0a9d3fa..bc497bca8eacb3809c55ce8c09babe3a18881293 100644
--- a/milo/appengine/buildbot/expectations/CrWinGoma.30608.build.json
+++ b/milo/appengine/buildbot/expectations/CrWinGoma.30608.build.json
@@ -11,6 +11,7 @@
       "Label": "build28-m1",
       "URL": "https://build.chromium.org/p//buildslaves/build28-m1"
     },
+    "Recipe": null,
     "Source": {
       "Label": "/CrWinGoma/30608",
       "URL": "https://build.chromium.org/p//builders/CrWinGoma/builds/30608"
@@ -47,6 +48,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -105,6 +107,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -134,6 +137,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -157,6 +161,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -186,6 +191,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -209,6 +215,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -238,6 +245,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -261,6 +269,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -290,6 +299,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -318,6 +328,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -341,6 +352,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -369,6 +381,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -398,6 +411,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -421,6 +435,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -444,6 +459,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -472,6 +488,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -498,6 +515,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
       "Source": null,
       "MainLink": {
         "Label": "stdio",
@@ -523,6 +541,7 @@
       "Status": "Success",
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+      "Recipe": null,
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       "MainLink": {
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@@ -546,6 +565,7 @@
       "Status": "Success",
       "Banner": null,
       "Bot": null,
+      "Recipe": null,
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       "MainLink": {
         "Label": "stdio",