--- xnu/xnu-4903.231.4/libkern/c++/OSSerialize.cpp
+++ xnu/xnu-3789.31.2/libkern/c++/OSSerialize.cpp
@@ -37,7 +37,6 @@
 #include <libkern/c++/OSLib.h>
 #include <libkern/c++/OSDictionary.h>
 #include <libkern/OSSerializeBinary.h>
-#include <libkern/Block.h>
 #include <IOKit/IOLib.h>
 
 #define super OSObject
@@ -291,35 +290,6 @@
     return( thing );
 }
 
-bool OSSerializer::callbackToBlock(void * target __unused, void * ref,
-                                     OSSerialize * serializer)
-{
-    return ((OSSerializerBlock)ref)(serializer);
-}
-
-OSSerializer * OSSerializer::withBlock(
-        OSSerializerBlock callback)
-{
-    OSSerializer * serializer;
-    OSSerializerBlock block;
-
-    block = Block_copy(callback);
-    if (!block) return (0);
-
-    serializer = (OSSerializer::forTarget(NULL, &OSSerializer::callbackToBlock, block));
-
-    if (!serializer) Block_release(block);
-
-    return (serializer);
-}
-
-void OSSerializer::free(void)
-{
-    if (callback == &callbackToBlock) Block_release(ref);
-
-    super::free();
-}
-
 bool OSSerializer::serialize( OSSerialize * s ) const
 {
     return( (*callback)(target, ref, s) );