--- Libc/Libc-1725.40.4/include/struct.h
+++ Libc/Libc-763.11/include/struct.h
@@ -48,32 +48,4 @@
 #define	strbase(name, addr, field) \
 	((struct name *)((char *)(addr) - fldoff(name, field)))
 
-/*
- * countof() cannot be safely used in a _Static_assert statement, so we provide
- * an unsafe variant that does not verify the input array is statically-defined.
- */
-#define countof_unsafe(arr) \
-	(sizeof(arr) / sizeof(arr[0]))
-
-/* Number of elements in a statically-defined array */
-#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && __GNUC__
-#define countof(arr) ({ \
-	_Static_assert( \
-			!__builtin_types_compatible_p(typeof(arr), typeof(&(arr)[0])), \
-			"array must be statically defined"); \
-	(sizeof(arr) / sizeof(arr[0])); \
-})
-#else
-#define countof(arr) \
-	countof_unsafe(arr)
-#endif
-
-/* Length of a statically-defined string (does not include null terminator) */
-#define lenof(str) \
-	(sizeof(str) - 1)
-
-/* Last index of a statically-defined array */
-#define lastof(arr) \
-	(countof(arr) - 1)
-
 #endif /* !_STRUCT_H_ */