[objects] Remove dead {Code::InvalidateRelocation}.

R=jarin@chromium.org
BUG=v8:6792

Change-Id: I76e9acb96cd89d4de163e533a1007c91f6b9970f
Reviewed-on: https://chromium-review.googlesource.com/738034Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48952}

src/objects.cc

@@ -13864,12 +13864,6 @@ void ObjectVisitor::VisitEmbeddedPointer(Code* host, RelocInfo* rinfo) {
 }
 
 
-void Code::InvalidateRelocation() {
-  InvalidateEmbeddedObjects();
-  set_relocation_info(GetHeap()->empty_byte_array());
-}
-
-
 void Code::InvalidateEmbeddedObjects() {
   HeapObject* undefined = GetHeap()->undefined_value();
   int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);

src/objects/code.h

@@ -146,7 +146,6 @@ class Code : public HeapObject {
 
   // [relocation_info]: Code relocation information
   DECL_ACCESSORS(relocation_info, ByteArray)
-  void InvalidateRelocation();
   void InvalidateEmbeddedObjects();
 
   // [handler_table]: Fixed array containing offsets of exception handlers.