Milo: Add LogDog annotation stream support.

appengine/cmd/milo/logdog/logDogStream.go

Index: appengine/cmd/milo/logdog/logDogStream.go
diff --git a/appengine/cmd/milo/logdog/logDogStream.go b/appengine/cmd/milo/logdog/logDogStream.go
index 265c2a45cfdbbb494a1cab88290de9399e806351..270d0fca8cd1d4640796b3ef5eae0523324f972e 100644
--- a/appengine/cmd/milo/logdog/logDogStream.go
+++ b/appengine/cmd/milo/logdog/logDogStream.go
@@ -5,8 +5,6 @@
 package logdog
 
 import (
-	"fmt"
-
 	miloProto "github.com/luci/luci-go/common/proto/milo"
 )
 
@@ -20,11 +18,6 @@ type Streams struct {
 	Streams map[string]*Stream
 }
 
-// GetFullPath returns the canonical URL of the logdog stream.
-func (s *Stream) GetFullPath() string {
-	return fmt.Sprintf("https://%s/%s/+/%s", s.Server, s.Prefix, s.Path)
-}
-
 // Stream represents a single LogDog style stream, which can contain either
 // annotations (assumed to be MiloProtos) or text.  Other types of annotations are
 // not supported.