Revert of Use a WeakCell in the CallIC type vector.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index aa621223cf5a5feb145838f8814e6de1efa7833d..ed4b065efad25123fe081ad40847db3b36213341 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -6227,10 +6227,6 @@
     return HObjectAccess(kInobject, WeakCell::kValueOffset);
   }
 
-  static HObjectAccess ForWeakCellNext() {
-    return HObjectAccess(kInobject, WeakCell::kNextOffset);
-  }
-
   static HObjectAccess ForAllocationMementoSite() {
     return HObjectAccess(kInobject, AllocationMemento::kAllocationSiteOffset);
   }