--- xnu/xnu-12377.101.15/libkern/compression/compression.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#include <libkern/libkern.h>
-#include <libkern/section_keywords.h>
-#include <libkern/compression/compression.h>
-
-#if defined(SECURITY_READ_ONLY_LATE)
-SECURITY_READ_ONLY_LATE(const compression_ki_t*) compression_ki_ptr = NULL;
-static SECURITY_READ_ONLY_LATE(registration_callback_t) registration_callback = NULL;
-#else
-const compression_ki_t* compression_ki_ptr = NULL;
-static registration_callback_t registration_callback = NULL;
-#endif
-
-void
-compression_interface_register(const compression_ki_t *ki)
-{
-	if (compression_ki_ptr) {
-		panic("compression interface already set");
-	}
-
-	compression_ki_ptr = ki;
-
-	if (registration_callback) {
-		registration_callback();
-	}
-}
-
-void
-compression_interface_set_registration_callback(registration_callback_t callback)
-{
-	if (callback && registration_callback) {
-		panic("compression interface registration callback is already set");
-	}
-
-	registration_callback = callback;
-}