Remove obsolete AIX workaround from wxLocale code

This code, added back in 420de418ea (workaround for buggy setlocale()
under AIX (without this wxLocale didn't work at all), 2005-09-18), is
probably irrelevant anyhow because AIX 5.2 must not be used any more,
but also seems to have lost its purpose at some time during the
intervening years, as we don't use "retloc" as argument to setlocale()
anyhow, so it is doubly safe to simply remove it.

src/common/intl.cpp

@@ -552,20 +552,6 @@ bool wxLocale::Init(int lang, int flags)
         if ( !localeAlt.empty() )
             retloc = wxSetlocaleTryAll(LC_ALL, localeAlt);
     }
-
-#ifdef __AIX__
-    // at least in AIX 5.2 libc is buggy and the string returned from
-    // setlocale(LC_ALL) can't be passed back to it because it returns 6
-    // strings (one for each locale category), i.e. for C locale we get back
-    // "C C C C C C"
-    //
-    // this contradicts IBM own docs but this is not of much help, so just work
-    // around it in the crudest possible manner
-    char* p = const_cast<char*>(wxStrchr(retloc, ' '));
-    if ( p )
-        *p = '\0';
-#endif // __AIX__
-
 #elif defined(__WIN32__)
     if ( lang == wxLANGUAGE_DEFAULT )
     {