Milo: Add current builds to buildbot builder view

milo/appengine/buildbot/master.go

Index: milo/appengine/buildbot/master.go
diff --git a/milo/appengine/buildbot/master.go b/milo/appengine/buildbot/master.go
index cc1dac0910cc36591a6230487ee620c4ba856d41..6fcef9219291e4fa81ae5969f850fc238d3dc4a9 100644
--- a/milo/appengine/buildbot/master.go
+++ b/milo/appengine/buildbot/master.go
@@ -9,7 +9,6 @@ import (
 	"compress/gzip"
 	"encoding/json"
 	"fmt"
-	"net/http"
 	"sort"
 	"time"
 
@@ -17,7 +16,6 @@ import (
 	"github.com/luci/luci-go/common/logging"
 	"github.com/luci/luci-go/milo/api/resp"
 	"github.com/luci/luci-go/milo/appengine/settings"
-	"github.com/luci/luci-go/milo/common/miloerror"
 
 	"golang.org/x/net/context"
 )
@@ -36,11 +34,6 @@ func decodeMasterEntry(
 	return nil
 }
 
-var errMasterNotFound = miloerror.Error{
-	Message: "Master not found",
-	Code:    http.StatusNotFound,
-}
-
 // getMasterEntry feches the named master and does an ACL check on the
 // current user.
 func getMasterEntry(c context.Context, name string) (*buildbotMasterEntry, error) {