ART: Remove more object_callbacks.h includes

Test: m
Change-Id: I01b45c86c37d952b15028f2177246611f02da887
diff --git a/runtime/mirror/throwable.cc b/runtime/mirror/throwable.cc
index 7027410..aee4b19 100644
--- a/runtime/mirror/throwable.cc
+++ b/runtime/mirror/throwable.cc
@@ -26,7 +26,6 @@
 #include "object-inl.h"
 #include "object_array.h"
 #include "object_array-inl.h"
-#include "object_callbacks.h"
 #include "stack_trace_element.h"
 #include "string.h"
 #include "utils.h"
diff --git a/runtime/openjdkjvmti/ti_heap.cc b/runtime/openjdkjvmti/ti_heap.cc
index e53503f..91fdaca 100644
--- a/runtime/openjdkjvmti/ti_heap.cc
+++ b/runtime/openjdkjvmti/ti_heap.cc
@@ -31,7 +31,6 @@
 #include "mirror/class.h"
 #include "mirror/object-inl.h"
 #include "mirror/object_array-inl.h"
-#include "object_callbacks.h"
 #include "object_tagging.h"
 #include "obj_ptr-inl.h"
 #include "primitive.h"