service_manager: More consistent Service lifecycle API

services/shape_detection/shape_detection_service.cc

Index: services/shape_detection/shape_detection_service.cc
diff --git a/services/shape_detection/shape_detection_service.cc b/services/shape_detection/shape_detection_service.cc
index e0105629f65d4988b5f25fd8ef14b1c032dcf7c2..c2375168d4b74a276aff9b53f39c2217339e7a1c 100644
--- a/services/shape_detection/shape_detection_service.cc
+++ b/services/shape_detection/shape_detection_service.cc
@@ -48,8 +48,4 @@ bool ShapeDetectionService::OnConnect(
   return true;
 }
 
-bool ShapeDetectionService::OnStop() {
-  return true;
-}
-
 }  // namespace shape_detection