Removed irrelevant comment about MSW charset in OSX code.

src/osx/fontutil.cpp

@@ -41,8 +41,7 @@ bool wxNativeEncodingInfo::FromString( const wxString& s )
     wxString tmp = tokenizer.GetNextToken();
     if ( !tmp )
     {
-        // default charset (don't use DEFAULT_CHARSET though because of subtle
+        // default charset
-        // Windows 9x/NT differences in handling it)
         charset = 0;
     }
     else