Drop Mac prefix on remaining instances of OS X in docs.

This should have been part of df33c0c491 but somehow where missed.

interface/wx/socket.h

@@ -658,7 +658,7 @@ enum wxSocketEventFlags
     This option can have surprising platform dependent behaviour, so check the
     documentation for your platform's implementation of setsockopt().
 
-    Note that on BSD-based systems(e.g. Mac OS X), use of
+    Note that on BSD-based systems(e.g. OS X), use of
     @b wxSOCKET_REUSEADDR implies @b SO_REUSEPORT in addition to
     @b SO_REUSEADDR to be consistent with Windows.