--- libmalloc/libmalloc-715.100.22/man/malloc.3
+++ libmalloc/libmalloc-374.40.6/man/malloc.3
@@ -318,26 +318,6 @@
 but will not abort in out of memory conditions, making it more useful to catch
 only those errors which will cause memory corruption.
 MallocCorruptionAbort is always set on 64-bit processes.
-.It Ev MallocZeroOnFree
-Starting in macOS 13, iOS 16.1 and aligned releases,
-.Xr free 3
-fully zeroes many blocks immediately.
-This may expose some previously-silent bugs in existing applications.
-In particular, read-after-free bugs may now observe zeroes instead of the
-previous content of an allocation, and write-after-free bugs may cause
-.Xr calloc 3
-to return non-zero memory.
-.Ev MallocZeroOnFree
-can be set to 0 or 1 to explicitly disable or enable this zeroing behavior to
-aid in diagnosing such bugs.
-Support for this environment variable will eventually be removed, and it should
-not be used by shipping software.
-.It Ev MallocCheckZeroOnFreeCorruption
-When zero-on-free behavior is active, this environment variable can be set to 1
-to cause the allocator to check that the free block chosen for a given
-allocation remained fully zeroed and was not corrupted by any invalid
-use-after-free writes.
-If corruption is detected, the allocator will abort.
 .It Ev MallocHelp
 If set, print a list of environment variables that are paid heed to by the
 allocation-related functions, along with short descriptions.