remove unused functions

arangod/Scheduler/Socket.h

@@ -128,6 +128,7 @@ class Socket {
       : _ioService(ioService),
         _context(std::move(context)),
         _encrypted(encrypted) {}
+  Socket(Socket const& that) = delete;
   Socket(Socket&& that) = delete;
   virtual ~Socket() {}
 

arangod/Scheduler/SocketTask.cpp

@@ -500,17 +500,3 @@ void SocketTask::asyncReadSome() {
         });
   }
 }
-
-// caller must hold the _writeLock
-void SocketTask::closeReceiveStream() {
-  if (!_closedReceive) {
-    try {
-      _peer->shutdownReceive();
-    } catch (boost::system::system_error& err) {
-      LOG_TOPIC(WARN, arangodb::Logger::FIXME) << "shutdown receive stream "
-                << " failed with: " << err.what();
-    }
-
-    _closedReceive = true;
-  }
-}

arangod/Scheduler/SocketTask.h

@@ -154,7 +154,6 @@ class SocketTask : virtual public Task {
   bool trySyncRead();
   bool processAll();
   void asyncReadSome();
-  void closeReceiveStream();
 
  private:
   Mutex _writeLock;

arangod/Scheduler/SocketTcp.h

@@ -38,7 +38,8 @@ class SocketTcp final : public Socket {
         _socket(_sslSocket.next_layer()),
         _peerEndpoint() {}
 
-  SocketTcp(SocketTcp&& that) = default;
+  SocketTcp(SocketTcp const& that) = delete;
+  SocketTcp(SocketTcp&& that) = delete;
 
   void close() override {
     MUTEX_LOCKER(guard, _lock);