Remove unused SIZEOF_MEMBER.

Bug: N/A
Test: builds
Change-Id: I941a5ad71020e4156c1f6fc94faadf9864137f05
diff --git a/libartbase/base/macros.h b/libartbase/base/macros.h
index 6dd981d..f26cf07 100644
--- a/libartbase/base/macros.h
+++ b/libartbase/base/macros.h
@@ -45,8 +45,6 @@
   private: \
     void* operator new(size_t) = delete  // NOLINT
 
-#define SIZEOF_MEMBER(t, f) sizeof((reinterpret_cast<t*>(4096))->f)  // NOLINT
-
 #define OFFSETOF_MEMBER(t, f) \
   (reinterpret_cast<uintptr_t>(&reinterpret_cast<t*>(16)->f) - static_cast<uintptr_t>(16u))  // NOLINT