locale.c: Remove one-off macro

This was used to prevent an unnecessary copy.  But the next commit will
change the macro it was avoiding to not always do the copy.  That will
avoid more copies than this would. The copy that results will still be
unnecessary in some cases, but there is a net gain.

locale.c

@@ -1259,8 +1259,6 @@ S_less_dicey_bool_setlocale_r(pTHX_ const int cat, const char * locale)
 #    include <libintl.h>
 #  endif
 
-#  define my_querylocale_c(cat) querylocale_2008_i(cat##_INDEX_)
-
 STATIC const char *
 S_querylocale_2008_i(pTHX_ const unsigned int index)
 {
@@ -1806,7 +1804,7 @@ S_bool_setlocale_2008_i(pTHX_
     /* Invalidate the glibc cache of loaded translations if the locale has
      * changed, see [perl #134264] */
     if (old_messages_locale) {
-        if (strNE(old_messages_locale, my_querylocale_c(LC_MESSAGES))) {
+        if (strNE(old_messages_locale, querylocale_c(LC_MESSAGES))) {
             textdomain(textdomain(NULL));
         }
     }