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

include/wx/unix/apptrait.h

@@ -58,7 +58,7 @@ public:
     virtual void MutexGuiLeave();
 #endif
 
-#if (defined(__WXMAC__) || defined(__WXCOCOA__)) && wxUSE_STDPATHS
+#if defined(__WXMAC__) && wxUSE_STDPATHS
     virtual wxStandardPaths& GetStandardPaths();
 #endif
     virtual wxPortId GetToolkitVersion(int *majVer = NULL, int *minVer = NULL) const wxOVERRIDE;