[libc++] Remove the pointer safety functions from the dylib

Author: philnik777

libcxx/src/CMakeLists.txt

@@ -32,7 +32,6 @@ set(LIBCXX_SOURCES
   include/ryu/ryu.h
   include/to_chars_floating_point.h
   include/from_chars_floating_point.h
-  legacy_pointer_safety.cpp
   memory.cpp
   memory_resource.cpp
   new_handler.cpp