move ctype bits from C to cbindgen

include/bits/ctype.h

@@ -1,7 +0,0 @@
-#ifndef _BITS_CTYPE_H
-#define _BITS_CTYPE_H
-
-#define _tolower(c) tolower(c)
-#define _toupper(c) toupper(c)
-
-#endif /* _BITS_CTYPE_H */

src/header/ctype/cbindgen.toml

@@ -4,9 +4,14 @@
 # - "The <ctype.h> header shall define the locale_t type as described in <locale.h>, representing a locale object."
 #
 # features.h included for #[deprecated] annotation
-sys_includes = ["bits/ctype.h", "features.h"]
+sys_includes = ["features.h"]
 include_guard = "_RELIBC_CTYPE_H"
-after_includes = "#include <bits/locale-t.h> // for locale_t"
+after_includes = """
+#include <bits/locale-t.h> // for locale_t
+
+#define _tolower(c) tolower(c)
+#define _toupper(c) toupper(c)
+"""
 language = "C"
 style = "Tag"
 no_includes = true