move more socket functions common to Winsock and BSD implementations to common code

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56938 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/unix/gsockunx.h

@@ -23,10 +23,6 @@ public:
     virtual void Shutdown();
     virtual GSocket *WaitConnection(wxSocketBase& wxsocket);
 
-    GSocketError SetLocal(GAddress *address);
-    GSocketError SetPeer(GAddress *address);
-    GAddress *GetLocal();
-    GAddress *GetPeer();
     GSocketError SetServer();
     bool SetReusable();
     bool SetBroadcast();