--- ruby-3.0.2/ext/nkf/nkf-utf8/nkf.h   2021-07-07 03:08:35.000000000 -0700
+++ ruby-3.0.2/ext/nkf/nkf-utf8/nkf.h   2021-09-16 11:43:53.021002630 -0700
@@ -152,14 +152,6 @@
 # ifndef HAVE_LOCALE_H
 #  define HAVE_LOCALE_H
 # endif
-#elif defined(__BIONIC__) /* bionic doesn't have locale */
-#else
-# ifndef HAVE_LANGINFO_H
-#  define HAVE_LANGINFO_H
-# endif
-# ifndef HAVE_LOCALE_H
-#  define HAVE_LOCALE_H
-# endif
 #endif

 #ifdef HAVE_LANGINFO_H