Hopefully finish removing the old wxCocoa port.

Get rid of the rest of __WXCOCOA__ tests in the sources.

Drop configure option for using it.

Also remove the documentation for this port.

This should have also been part of r76735.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76815 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/taskbar/tbtest.cpp

@@ -148,9 +148,6 @@ MyDialog::MyDialog(const wxString& title)
 MyDialog::~MyDialog()
 {
     delete m_taskBarIcon;
-#if defined(__WXCOCOA__)
-    delete m_dockIcon;
-#endif
 }
 
 void MyDialog::OnAbout(wxCommandEvent& WXUNUSED(event))