--- Libc/Libc-1725.40.4/os/debug_private.h
+++ Libc/Libc-1534.40.2/os/debug_private.h
@@ -28,7 +28,6 @@
 
 #include <os/base_private.h>
 #include <stdarg.h>
-#include <stdbool.h>
 
 OS_ASSUME_PTR_ABI_SINGLE_BEGIN
 
@@ -73,9 +72,6 @@
 # pragma mark -
 # pragma mark Private To Libc
 
-// weak symbol that main binaries can override with os_debug_log_redirect()
-extern bool _os_debug_log_redirect_func(const char *);
-
 // str must be modifiable (non-const)!
 __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_6_0)
 OS_COLD