Remove now unused BinaryMintOp from the IL.

runtime/vm/flow_graph_optimizer.cc

 // 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.
 
 #include "vm/flow_graph_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/flow_graph_compiler.h"
@@ skipping 2883 matching lines @@
 }
 
 
 void ConstantPropagator::VisitUnboxedMintBinaryOp(
     UnboxedMintBinaryOpInstr* instr) {
   // TODO(kmillikin): Handle binary operations.
   SetValue(instr, non_constant_);
 }
 
 
-void ConstantPropagator::VisitBinaryMintOp(BinaryMintOpInstr* instr) {
-  const Object& left = instr->left()->definition()->constant_value();
-  const Object& right = instr->right()->definition()->constant_value();
-  if (IsNonConstant(left) || IsNonConstant(right)) {
-    SetValue(instr, non_constant_);
-  } else if (IsConstant(left) && IsConstant(right)) {
-    // TODO(kmillikin): Handle binary operations.
-    SetValue(instr, non_constant_);
-  }
-}
-
-
 void ConstantPropagator::VisitUnarySmiOp(UnarySmiOpInstr* instr) {
   const Object& value = instr->value()->definition()->constant_value();
   if (IsNonConstant(value)) {
     SetValue(instr, non_constant_);
   } else if (IsConstant(value)) {
     // TODO(kmillikin): Handle unary operations.
     SetValue(instr, non_constant_);
   }
 }
 
@@ skipping 223 matching lines @@
 
   if (FLAG_trace_constant_propagation) {
     OS::Print("\n==== After constant propagation ====\n");
     FlowGraphPrinter printer(*graph_);
     printer.PrintBlocks();
   }
 }
 
 
 }  // namespace dart