FlavorTagDiscriminants: use extends to auto-declare interface inheritance

PhysicsAnalysis/JetTagging/FlavorTagDiscriminants/FlavorTagDiscriminants/NNSharingSvc.h

@@ -28,10 +28,11 @@ namespace FlavorTagDiscriminants
     };
   }
 
-  class NNSharingSvc: public asg::AsgService, public INNSharingSvc
+  class NNSharingSvc: public extends<asg::AsgService, INNSharingSvc>
   {
   public:
-    NNSharingSvc(const std::string& name, ISvcLocator* svc);
+    using extends::extends;  // base class constructor
+
     virtual std::shared_ptr<const GNN> get(
       const std::string& nn_name,
       const GNNOptions& opts) override;

PhysicsAnalysis/JetTagging/FlavorTagDiscriminants/Root/NNSharingSvc.cxx

@@ -19,11 +19,6 @@ namespace FlavorTagDiscriminants {
     }
   }
 
-  NNSharingSvc::NNSharingSvc(const std::string& name, ISvcLocator* svc):
-    AsgService(name, svc)
-  {
-    declareServiceInterface<INNSharingSvc>();
-  }
   std::shared_ptr<const GNN> NNSharingSvc::get(
     const std::string& nn_name,
     const GNNOptions& opts) {