[Client] Remove unused Networking::attack() method

apps/openmw/mwmp/Networking.cpp

@@ -308,16 +308,6 @@ bool Networking::isDedicatedPlayer(const MWWorld::Ptr &ptr)
     return pl != 0;
 }
 
-bool Networking::attack(const MWWorld::Ptr &ptr)
-{
-    DedicatedPlayer *pl = PlayerList::getPlayer(ptr);
-
-    if (pl == 0)
-        return false;
-
-    return pl->attack.pressed;
-}
-
 bool Networking::isConnected()
 {
     return connected;

apps/openmw/mwmp/Networking.hpp

@@ -36,7 +36,6 @@ namespace mwmp
         WorldPacket *getWorldPacket(RakNet::MessageID id);
 
         bool isDedicatedPlayer(const MWWorld::Ptr &ptr);
-        bool attack(const MWWorld::Ptr &ptr);
 
         RakNet::SystemAddress serverAddress()
         {