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

interface/wx/debug.h

@@ -317,7 +317,7 @@ void wxDisableAsserts();
     Returns @true if the program is running under debugger, @false otherwise.
 
     Please note that this function is currently only implemented for Win32 and
-    Mac builds using CodeWarrior and always returns @false elsewhere.
+    always returns @false elsewhere.
 
     @header{wx/debug.h}
 */

interface/wx/textfile.h

@@ -145,9 +145,9 @@ public:
 
         @e typeDefault is the value defined during the compilation and corresponds
         to the native format of the platform, i.e. it will be @c wxTextFileType_Dos
-        under Windows, @c wxTextFileType_Unix under Unix (including Mac OS X when
-        compiling with the Apple Developer Tools) and @c wxTextFileType_Mac under
-        Mac OS (including Mac OS X when compiling with CodeWarrior).
+        under Windows and @c wxTextFileType_Unix under Unix (including Mac OS
+        X, the value @c wxTextFileType_Mac was only used for classic Mac OS
+        versions).
     */
     static const wxChar* GetEOL(wxTextFileType type = typeDefault);