remove m_use_events from Unix wxSocket implementation, we always need asynchronous socket notifications now (and this was always the case under Windows anyhow), even if we don't always generate wx events corresponding to them

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57569 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/private/socket.h

@@ -267,9 +267,6 @@ public:
     // named) OnRequest() method
     void NotifyOnStateChange(wxSocketNotify event);
 
-    // FIXME: this one probably isn't needed here at all
-    virtual void Notify(bool WXUNUSED(notify)) { }
-
     // TODO: make these fields protected and provide accessors for those of
     //       them that wxSocketBase really needs
 //protected: