diff --git a/objc/runtime.h b/objc/runtime.h
index ceec165..ec5287f 100644
--- a/objc/runtime.h
+++ b/objc/runtime.h
@@ -300,21 +300,6 @@ unsigned sel_copyTypes(const char *selName, const char **types, unsigned count);
  */
 extern struct objc_slot *objc_msg_lookup_sender(id *receiver, SEL selector, id sender)
 	OBJC_NONPORTABLE;
-/**
- * Hook provided to allow libraries to support fast proxies.
- */
-extern id (*objc_proxy_lookup)(id receiver, SEL op) OBJC_NONPORTABLE;
-/**
- * New message lookup hook.  This returns a slot, rather than an IMP.  The
- * version should be set to 0 to disable caching.
- */
-extern struct objc_slot *(*objc_msg_forward3)(id receiver, SEL op) OBJC_NONPORTABLE;
-
-/**
- * Runtime hook for unhandled exceptions.  This is called if an exception is
- * not caught.
- */
-extern void (*__objc_unhandled_exception)(id);
 
 // Global self so that self is a valid symbol everywhere.  Will be replaced by
 // a real self in an inner scope if there is one.