Revert of Use weak cells in map checks in polymorphic ICs.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index 158f1b18dba81d62287014ca4b9c1c08d1a3afc9..383233bd25146f9c7ca910964ccab87a94404cde 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -299,13 +299,6 @@
     }
   }
 
-  // Compare the given value and the value of weak cell.
-  void CmpWeakValue(Register value, Handle<WeakCell> cell, Register scratch);
-
-  // Load the value of the weak cell in the value register. Branch to the given
-  // miss label if the weak cell was cleared.
-  void LoadWeakValue(Register value, Handle<WeakCell> cell, Label* miss);
-
   // ---------------------------------------------------------------------------
   // JavaScript invokes