[logdog] Remove list functionality.

logdog/appengine/coordinator/endpoints/services/registerStream.go

Index: logdog/appengine/coordinator/endpoints/services/registerStream.go
diff --git a/logdog/appengine/coordinator/endpoints/services/registerStream.go b/logdog/appengine/coordinator/endpoints/services/registerStream.go
index 1429940afb7c421e3ee9ad955fb4d14ee4a6978b..809b1496a10883ed9fe077e5b34dd274a2df4b89 100644
--- a/logdog/appengine/coordinator/endpoints/services/registerStream.go
+++ b/logdog/appengine/coordinator/endpoints/services/registerStream.go
@@ -26,7 +26,6 @@ import (
 	"github.com/luci/luci-go/logdog/api/logpb"
 	"github.com/luci/luci-go/logdog/appengine/coordinator"
 	"github.com/luci/luci-go/logdog/appengine/coordinator/endpoints"
-	"github.com/luci/luci-go/logdog/appengine/coordinator/hierarchy"
 	"github.com/luci/luci-go/logdog/appengine/coordinator/mutations"
 	"github.com/luci/luci-go/logdog/common/types"
 	"github.com/luci/luci-go/tumble"
@@ -153,22 +152,6 @@ func (s *server) RegisterStream(c context.Context, req *logdog.RegisterStreamReq
 			return nil, err
 		}
 
-		// The stream is not registered. Perform a transactional registration via
-		// mutation.
-		//
-		// Determine which hierarchy components we need to add.
-		comps := hierarchy.Components(path, true)
-		if comps, err = hierarchy.Missing(c, comps); err != nil {
-			log.WithError(err).Warningf(c, "Failed to probe for missing hierarchy components.")
-		}
-
-		// Before we go into transaction, try and put these entries. This should not
-		// be contested, since components don't share an entity root.
-		if err := hierarchy.PutMulti(c, comps); err != nil {
-			log.WithError(err).Errorf(c, "Failed to add missing hierarchy components.")
-			return nil, grpcutil.Internal
-		}
-
 		// The stream does not exist. Proceed with transactional registration.
 		lstKey := ds.KeyForObj(c, lst)
 		err = tumble.RunUnbuffered(c, lstKey, func(c context.Context) ([]tumble.Mutation, error) {