Remove support for MetroWerks CodeWarrior compiler.

This compiler doesn't exist any more and was probably unsupported even in 2.8,
let alone 2.9, so remove all the __MWERKS__ tests to simplify things.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71102 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/sckaddr.cpp

@@ -37,9 +37,7 @@
     #include <stdlib.h>
     #include <ctype.h>
 
-    #if !defined(__MWERKS__)
-        #include <memory.h>
-    #endif
+    #include <memory.h>
 #endif // !WX_PRECOMP
 
 #include "wx/socket.h"