Remove unused code from aot optimizer.

runtime/vm/aot_optimizer.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_AOT_OPTIMIZER_H_
 #define VM_AOT_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
@@ skipping 44 matching lines @@
                     Environment* env,
                     FlowGraph::UseKind use_kind) {
     flow_graph_->InsertBefore(next, instr, env, use_kind);
   }
 
  private:
   // Attempt to build ICData for call using propagated class-ids.
   bool TryCreateICData(InstanceCallInstr* call);
   const ICData& TrySpecializeICData(const ICData& ic_data, intptr_t cid);
 
-  void SpecializePolymorphicInstanceCall(PolymorphicInstanceCallInstr* call);
-
   bool TryReplaceWithIndexedOp(InstanceCallInstr* call);
 
   bool TryReplaceWithBinaryOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool TryReplaceWithUnaryOp(InstanceCallInstr* call, Token::Kind op_kind);
 
   bool TryReplaceWithEqualityOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool TryReplaceWithRelationalOp(InstanceCallInstr* call, Token::Kind op_kind);
 
   bool TryInlineInstanceGetter(InstanceCallInstr* call);
   bool TryInlineInstanceSetter(InstanceCallInstr* call,
@@ skipping 96 matching lines @@
 
   GrowableArray<intptr_t>* inlining_black_list_;
 
   DISALLOW_COPY_AND_ASSIGN(AotOptimizer);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_AOT_OPTIMIZER_H_