Drop Ueberbackend handle instance counter, nothing uses it.

Signed-off-by: Miod Vallat <[email protected]>

Author: miodvallat

pdns/ueberbackend.cc

@@ -1063,19 +1063,6 @@ void UeberBackend::flush()
   }
 }
 
-AtomicCounter UeberBackend::handle::instances(0);
-
-UeberBackend::handle::handle()
-{
-  //  g_log<<Logger::Warning<<"Handle instances: "<<instances<<endl;
-  ++instances;
-}
-
-UeberBackend::handle::~handle()
-{
-  --instances;
-}
-
 // Set d_hinterBackend to the next available backend from the parents list,
 // reset it to nullptr if the whole list has been processed.
 // Invokes lookup on behalf of the newly picked backend if successful.

pdns/ueberbackend.hh

@@ -68,8 +68,6 @@ public:
   public:
     bool get(DNSZoneRecord& record);
     void lookupEnd() const;
-    handle();
-    ~handle();
 
     //! The UeberBackend class where this handle belongs to
     UeberBackend* parent{nullptr};
@@ -86,8 +84,6 @@ public:
     void selectNextBackend();
 
   private:
-    static AtomicCounter instances;
-
     //! The currently selected real backend, which is answering questions
     DNSBackend* d_hinterBackend{nullptr};
   };